16625920 has 72 divisors (see below), whose sum is σ = 41207040. Its totient is φ = 6420480.

The previous prime is 16625891. The next prime is 16625933. The reversal of 16625920 is 2952661.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a nialpdrome in base 16.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39471 + ... + 39889.

It is an arithmetic number, because the mean of its divisors is an integer number (572320).

Almost surely, 2^16625920 is an apocalyptic number.

16625920 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 16625920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20603520).

16625920 is an abundant number, since it is smaller than the sum of its proper divisors (24581120).

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

16625920 is an equidigital number, since it uses as much as digits as its factorization.

16625920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471 (or 457 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 16625920 is about 4077.4894236527. The cubic root of 16625920 is about 255.2281438942.

The spelling of 16625920 in words is "sixteen million, six hundred twenty-five thousand, nine hundred twenty".