20872404 has 60 divisors (see below), whose sum is σ = 62366304. Its totient is φ = 5962896.

The previous prime is 20872387. The next prime is 20872409. The reversal of 20872404 is 40427802.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20872409) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2334 + ... + 6869.

Almost surely, 2^20872404 is an apocalyptic number.

It is an amenable number.

20872404 is an abundant number, since it is smaller than the sum of its proper divisors (41493900).

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

20872404 is a wasteful number, since it uses less digits than its factorization.

20872404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9226 (or 9215 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 27.

The square root of 20872404 is about 4568.6326181911. The cubic root of 20872404 is about 275.3325079888.

The spelling of 20872404 in words is "twenty million, eight hundred seventy-two thousand, four hundred four".