20311372 has 12 divisors (see below), whose sum is σ = 36505840. Its totient is φ = 9881136.

The previous prime is 20311363. The next prime is 20311381. The reversal of 20311372 is 27311302.

It is an interprime number because it is at equal distance from previous prime (20311363) and next prime (20311381).

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, 68472 + ... + 68767.

Almost surely, 2^20311372 is an apocalyptic number.

It is an amenable number.

20311372 is a deficient number, since it is larger than the sum of its proper divisors (16194468).

20311372 is a wasteful number, since it uses less digits than its factorization.

20311372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137280 (or 137278 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 19.

The square root of 20311372 is about 4506.8139522283. The cubic root of 20311372 is about 272.8431700413.

Adding to 20311372 its reverse (27311302), we get a palindrome (47622674).

It can be divided in two parts, 2031 and 1372, that added together give a triangular number (3403 = T₈₂).

The spelling of 20311372 in words is "twenty million, three hundred eleven thousand, three hundred seventy-two".