20586972 has 24 divisors (see below), whose sum is σ = 54898816. Its totient is φ = 5881968.

The previous prime is 20586971. The next prime is 20586991. The reversal of 20586972 is 27968502.

It is a happy number.

It is a super-2 number, since 2×20586972² = 847646832257568, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20586972.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20586971) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122458 + ... + 122625.

Almost surely, 2^20586972 is an apocalyptic number.

It is an amenable number.

20586972 is an abundant number, since it is smaller than the sum of its proper divisors (34311844).

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

20586972 is a wasteful number, since it uses less digits than its factorization.

20586972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245097 (or 245095 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 20586972 is about 4537.2868544980. The cubic root of 20586972 is about 274.0716774845.

The spelling of 20586972 in words is "twenty million, five hundred eighty-six thousand, nine hundred seventy-two".