20686651827524 has 24 divisors (see below), whose sum is σ = 36247872658368. Its totient is φ = 10330117907040.

The previous prime is 20686651827493. The next prime is 20686651827613. The reversal of 20686651827524 is 42572815668602.

It is a Smith number, since the sum of its digits (62) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80865242 + ... + 81120654.

It is an arithmetic number, because the mean of its divisors is an integer number (1510328027432).

Almost surely, 2^{20686651827524} is an apocalyptic number.

It is an amenable number.

20686651827524 is a deficient number, since it is larger than the sum of its proper divisors (15561220830844).

20686651827524 is a wasteful number, since it uses less digits than its factorization.

20686651827524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281195 (or 281193 counting only the distinct ones).

The product of its (nonzero) digits is 77414400, while the sum is 62.

The spelling of 20686651827524 in words is "twenty trillion, six hundred eighty-six billion, six hundred fifty-one million, eight hundred twenty-seven thousand, five hundred twenty-four".