20582004 has 12 divisors (see below), whose sum is σ = 48024704. Its totient is φ = 6860664.

The previous prime is 20581999. The next prime is 20582011. The reversal of 20582004 is 40028502.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 857572 + ... + 857595.

Almost surely, 2^20582004 is an apocalyptic number.

It is an amenable number.

20582004 is an abundant number, since it is smaller than the sum of its proper divisors (27442700).

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

20582004 is a wasteful number, since it uses less digits than its factorization.

20582004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1715174 (or 1715172 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 20582004 is about 4536.7393577326. The cubic root of 20582004 is about 274.0496295985.

The spelling of 20582004 in words is "twenty million, five hundred eighty-two thousand, four".