20311670564 has 12 divisors (see below), whose sum is σ = 35546649264. Its totient is φ = 10155485064.

The previous prime is 20311670563. The next prime is 20311670569. The reversal of 20311670564 is 46507611302.

It is a super-2 number, since 2×20311670564² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20311670563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77519 + ... + 215945.

It is an arithmetic number, because the mean of its divisors is an integer number (2962220772).

Almost surely, 2^20311670564 is an apocalyptic number.

It is an amenable number.

20311670564 is a deficient number, since it is larger than the sum of its proper divisors (15234978700).

20311670564 is a wasteful number, since it uses less digits than its factorization.

20311670564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175114 (or 175112 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 35.

The spelling of 20311670564 in words is "twenty billion, three hundred eleven million, six hundred seventy thousand, five hundred sixty-four".