16620172 has 12 divisors (see below), whose sum is σ = 29175496. Its totient is φ = 8284320.

The previous prime is 16620157. The next prime is 16620173. The reversal of 16620172 is 27102661.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (16620173) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4953 + ... + 7600.

Almost surely, 2^16620172 is an apocalyptic number.

It is an amenable number.

16620172 is a deficient number, since it is larger than the sum of its proper divisors (12555324).

16620172 is a wasteful number, since it uses less digits than its factorization.

16620172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12888 (or 12886 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 16620172 is about 4076.7845172390. The cubic root of 16620172 is about 255.1987275677.

The spelling of 16620172 in words is "sixteen million, six hundred twenty thousand, one hundred seventy-two".