12016620 has 288 divisors, whose sum is σ = 49512960. Its totient is φ = 2350080.

The previous prime is 12016619. The next prime is 12016621. The reversal of 12016620 is 2661021.

It is a happy number.

12016620 is a `hidden beast` number, since 1 + 2 + 0 + 1 + 662 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (12016619) and next prime (12016621).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 12016593 and 12016602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12016621) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 706852 + ... + 706868.

It is an arithmetic number, because the mean of its divisors is an integer number (171920).

Almost surely, 2^12016620 is an apocalyptic number.

12016620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12016620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24756480).

12016620 is an abundant number, since it is smaller than the sum of its proper divisors (37496340).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12016620 is a wasteful number, since it uses less digits than its factorization.

12016620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70 (or 45 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 12016620 is about 3466.4996754652. The cubic root of 12016620 is about 229.0484950339.

12016620 divided by its sum of digits (18) gives a triangular number (667590 = T₁₁₅₅).

Adding to 12016620 its reverse (2661021), we get a palindrome (14677641).

The spelling of 12016620 in words is "twelve million, sixteen thousand, six hundred twenty".