20311031132 has 12 divisors (see below), whose sum is σ = 40622062320. Its totient is φ = 8704727616.

The previous prime is 20311031113. The next prime is 20311031183. The reversal of 20311031132 is 23113011302.

20311031132 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 20311031132.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 362696957 + ... + 362697012.

It is an arithmetic number, because the mean of its divisors is an integer number (3385171860).

Almost surely, 2^20311031132 is an apocalyptic number.

It is an amenable number.

20311031132 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20311031132 is a wasteful number, since it uses less digits than its factorization.

20311031132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 725393980 (or 725393978 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 20311031132 its reverse (23113011302), we get a palindrome (43424042434).

The spelling of 20311031132 in words is "twenty billion, three hundred eleven million, thirty-one thousand, one hundred thirty-two".