20184872 has 16 divisors (see below), whose sum is σ = 38146560. Its totient is φ = 10012464.

The previous prime is 20184863. The next prime is 20184877. The reversal of 20184872 is 27848102.

It is not an unprimeable number, because it can be changed into a prime (20184877) 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, 8918 + ... + 10949.

It is an arithmetic number, because the mean of its divisors is an integer number (2384160).

Almost surely, 2^20184872 is an apocalyptic number.

It is an amenable number.

20184872 is a deficient number, since it is larger than the sum of its proper divisors (17961688).

20184872 is a wasteful number, since it uses less digits than its factorization.

20184872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20000 (or 19996 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 32.

The square root of 20184872 is about 4492.7577277214. The cubic root of 20184872 is about 272.2755641563.

The spelling of 20184872 in words is "twenty million, one hundred eighty-four thousand, eight hundred seventy-two".