20116761641572 has 24 divisors (see below), whose sum is σ = 35411094976376. Its totient is φ = 9999377676288.

The previous prime is 20116761641567. The next prime is 20116761641663. The reversal of 20116761641572 is 27514616761102.

It can be written as a sum of positive squares in 4 ways, for example, as 11898815685156 + 8217945956416 = 3449466^2 + 2866696^2 .

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, 7845243 + ... + 10088674.

Almost surely, 2^{20116761641572} is an apocalyptic number.

It is an amenable number.

20116761641572 is a deficient number, since it is larger than the sum of its proper divisors (15294333334804).

20116761641572 is a wasteful number, since it uses less digits than its factorization.

20116761641572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17935567 (or 17935565 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 49.

The spelling of 20116761641572 in words is "twenty trillion, one hundred sixteen billion, seven hundred sixty-one million, six hundred forty-one thousand, five hundred seventy-two".