20113992 has 48 divisors (see below), whose sum is σ = 57683340. Its totient is φ = 6309888.

The previous prime is 20113963. The next prime is 20113993. The reversal of 20113992 is 29931102.

It can be written as a sum of positive squares in 2 ways, for example, as 15729156 + 4384836 = 3966^2 + 2094^2 .

It is not an unprimeable number, because it can be changed into a prime (20113993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6993 + ... + 9440.

Almost surely, 2^20113992 is an apocalyptic number.

It is an amenable number.

20113992 is an abundant number, since it is smaller than the sum of its proper divisors (37569348).

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

20113992 is a wasteful number, since it uses less digits than its factorization.

20113992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16462 (or 16455 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 20113992 is about 4484.8625396995. The cubic root of 20113992 is about 271.9564881378.

The spelling of 20113992 in words is "twenty million, one hundred thirteen thousand, nine hundred ninety-two".