20397204 has 24 divisors (see below), whose sum is σ = 52881920. Its totient is φ = 6799032.

The previous prime is 20397199. The next prime is 20397211. The reversal of 20397204 is 40279302.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

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 in 7 ways as a sum of consecutive naturals, for example, 94324 + ... + 94539.

Almost surely, 2^20397204 is an apocalyptic number.

It is an amenable number.

20397204 is an abundant number, since it is smaller than the sum of its proper divisors (32484716).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20397204 is a wasteful number, since it uses less digits than its factorization.

20397204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188876 (or 188868 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 20397204 is about 4516.3263832456. The cubic root of 20397204 is about 273.2269577470.

The spelling of 20397204 in words is "twenty million, three hundred ninety-seven thousand, two hundred four".