20975681580084 has 144 divisors (see below), whose sum is σ = 66510732986880. Its totient is φ = 5414804147520.

The previous prime is 20975681580017. The next prime is 20975681580109. The reversal of 20975681580084 is 48008518657902.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 22759774 + ... + 23663445.

Almost surely, 2^{20975681580084} is an apocalyptic number.

It is an amenable number.

20975681580084 is an abundant number, since it is smaller than the sum of its proper divisors (45535051406796).

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

20975681580084 is a wasteful number, since it uses less digits than its factorization.

20975681580084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46423410 (or 46423405 counting only the distinct ones).

The product of its (nonzero) digits is 38707200, while the sum is 63.

The spelling of 20975681580084 in words is "twenty trillion, nine hundred seventy-five billion, six hundred eighty-one million, five hundred eighty thousand, eighty-four".