20164972 has 6 divisors (see below), whose sum is σ = 35288708. Its totient is φ = 10082484.

The previous prime is 20164967. The next prime is 20164981. The reversal of 20164972 is 27946102.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2520618 + ... + 2520625.

Almost surely, 2^20164972 is an apocalyptic number.

It is an amenable number.

20164972 is a deficient number, since it is larger than the sum of its proper divisors (15123736).

20164972 is a wasteful number, since it uses less digits than its factorization.

20164972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5041247 (or 5041245 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 20164972 is about 4490.5425062012. The cubic root of 20164972 is about 272.1860571019.

The spelling of 20164972 in words is "twenty million, one hundred sixty-four thousand, nine hundred seventy-two".