20616000 has 112 divisors (see below), whose sum is σ = 68153280. Its totient is φ = 5491200.

The previous prime is 20615977. The next prime is 20616017. The reversal of 20616000 is 61602.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23571 + ... + 24429.

Almost surely, 2^20616000 is an apocalyptic number.

20616000 is a gapful number since it is divisible by the number (20) 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 20616000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34076640).

20616000 is an abundant number, since it is smaller than the sum of its proper divisors (47537280).

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

20616000 is an equidigital number, since it uses as much as digits as its factorization.

20616000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 889 (or 869 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 20616000 is about 4540.4845556394. The cubic root of 20616000 is about 274.2004323159.

Adding to 20616000 its reverse (61602), we get a palindrome (20677602).

The spelling of 20616000 in words is "twenty million, six hundred sixteen thousand".