20268172 has 24 divisors (see below), whose sum is σ = 36892800. Its totient is φ = 9732480.

The previous prime is 20268169. The next prime is 20268197. The reversal of 20268172 is 27186202.

It is a self number, because there is not a number n which added to its sum of digits gives 20268172.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17928 + ... + 19024.

It is an arithmetic number, because the mean of its divisors is an integer number (1537200).

Almost surely, 2^20268172 is an apocalyptic number.

It is an amenable number.

20268172 is a deficient number, since it is larger than the sum of its proper divisors (16624628).

20268172 is a wasteful number, since it uses less digits than its factorization.

20268172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1281 (or 1279 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 20268172 is about 4502.0186583354. The cubic root of 20268172 is about 272.6495971790.

The spelling of 20268172 in words is "twenty million, two hundred sixty-eight thousand, one hundred seventy-two".