20910172 has 12 divisors (see below), whose sum is σ = 36625456. Its totient is φ = 10445760.

The previous prime is 20910167. The next prime is 20910179. The reversal of 20910172 is 27101902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20910179) 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, 6097 + ... + 8887.

Almost surely, 2^20910172 is an apocalyptic number.

It is an amenable number.

20910172 is a deficient number, since it is larger than the sum of its proper divisors (15715284).

20910172 is a wasteful number, since it uses less digits than its factorization.

20910172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4668 (or 4666 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 20910172 is about 4572.7641531135. The cubic root of 20910172 is about 275.4984766106.

The spelling of 20910172 in words is "twenty million, nine hundred ten thousand, one hundred seventy-two".