20476163356520 has 64 divisors (see below), whose sum is σ = 46995672845520. Its totient is φ = 8026506768384.

The previous prime is 20476163356511. The next prime is 20476163356601. The reversal of 20476163356520 is 2565336167402.

It can be written as a sum of positive squares in 8 ways, for example, as 13081777531876 + 7394385824644 = 3616874^2 + 2719262^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3853169 + ... + 7469888.

Almost surely, 2^{20476163356520} is an apocalyptic number.

20476163356520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20476163356520 is an abundant number, since it is smaller than the sum of its proper divisors (26519509489000).

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

20476163356520 is a wasteful number, since it uses less digits than its factorization.

20476163356520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11323974 (or 11323970 counting only the distinct ones).

The product of its (nonzero) digits is 5443200, while the sum is 50.

The spelling of 20476163356520 in words is "twenty trillion, four hundred seventy-six billion, one hundred sixty-three million, three hundred fifty-six thousand, five hundred twenty".