20131372 has 6 divisors (see below), whose sum is σ = 35229908. Its totient is φ = 10065684.

The previous prime is 20131339. The next prime is 20131373. The reversal of 20131372 is 27313102.

It is not an unprimeable number, because it can be changed into a prime (20131373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2516418 + ... + 2516425.

Almost surely, 2^20131372 is an apocalyptic number.

It is an amenable number.

20131372 is a deficient number, since it is larger than the sum of its proper divisors (15098536).

20131372 is a wasteful number, since it uses less digits than its factorization.

20131372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5032847 (or 5032845 counting only the distinct ones).

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

The square root of 20131372 is about 4486.7997503789. The cubic root of 20131372 is about 272.0347958657.

Adding to 20131372 its reverse (27313102), we get a palindrome (47444474).

It can be divided in two parts, 20131 and 372, that added together give a triangular number (20503 = T₂₀₂).

The spelling of 20131372 in words is "twenty million, one hundred thirty-one thousand, three hundred seventy-two".