16122420 has 72 divisors (see below), whose sum is σ = 50066016. Its totient is φ = 4197312.

The previous prime is 16122413. The next prime is 16122427. The reversal of 16122420 is 2422161.

It is an interprime number because it is at equal distance from previous prime (16122413) and next prime (16122427).

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 = 16122393 and 16122402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16122427) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6699 + ... + 8781.

Almost surely, 2^16122420 is an apocalyptic number.

16122420 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 16122420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25033008).

16122420 is an abundant number, since it is smaller than the sum of its proper divisors (33943596).

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

16122420 is a wasteful number, since it uses less digits than its factorization.

16122420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2141 (or 2136 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 16122420 is about 4015.2733406332. The cubic root of 16122420 is about 252.6252425768.

Adding to 16122420 its reverse (2422161), we get a palindrome (18544581).

The spelling of 16122420 in words is "sixteen million, one hundred twenty-two thousand, four hundred twenty".