20814131736 has 64 divisors (see below), whose sum is σ = 57859200000. Its totient is φ = 6932983968.

The previous prime is 20814131717. The next prime is 20814131759. The reversal of 20814131736 is 63713141802.

It is a happy number.

20814131736 is a `hidden beast` number, since 208 + 1 + 413 + 1 + 7 + 36 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 20814131736.

It is a congruent number.

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, 267745 + ... + 336623.

It is an arithmetic number, because the mean of its divisors is an integer number (904050000).

Almost surely, 2^20814131736 is an apocalyptic number.

It is an amenable number.

20814131736 is an abundant number, since it is smaller than the sum of its proper divisors (37045068264).

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

20814131736 is a wasteful number, since it uses less digits than its factorization.

20814131736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70293 (or 70283 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The spelling of 20814131736 in words is "twenty billion, eight hundred fourteen million, one hundred thirty-one thousand, seven hundred thirty-six".