20311213112 has 16 divisors (see below), whose sum is σ = 38153927400. Its totient is φ = 10136832480.

The previous prime is 20311213073. The next prime is 20311213133. The reversal of 20311213112 is 21131211302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2342162 + ... + 2350817.

Almost surely, 2^20311213112 is an apocalyptic number.

It is an amenable number.

20311213112 is a deficient number, since it is larger than the sum of its proper divisors (17842714288).

20311213112 is a wasteful number, since it uses less digits than its factorization.

20311213112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4693526 (or 4693522 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 20311213112 its reverse (21131211302), we get a palindrome (41442424414).

The spelling of 20311213112 in words is "twenty billion, three hundred eleven million, two hundred thirteen thousand, one hundred twelve".