20372261131 has 4 divisors (see below), whose sum is σ = 20461223200. Its totient is φ = 20283299064.

The previous prime is 20372261089. The next prime is 20372261153. The reversal of 20372261131 is 13116227302.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20372261131 - 2⁷ = 20372261003 is a prime.

It is a super-2 number, since 2×20372261131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20372261131.

It is not an unprimeable number, because it can be changed into a prime (20372261171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44480691 + ... + 44481148.

It is an arithmetic number, because the mean of its divisors is an integer number (5115305800).

Almost surely, 2^20372261131 is an apocalyptic number.

20372261131 is a deficient number, since it is larger than the sum of its proper divisors (88962069).

20372261131 is an equidigital number, since it uses as much as digits as its factorization.

20372261131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88962068.

The product of its (nonzero) digits is 3024, while the sum is 28.

Adding to 20372261131 its reverse (13116227302), we get a palindrome (33488488433).

The spelling of 20372261131 in words is "twenty billion, three hundred seventy-two million, two hundred sixty-one thousand, one hundred thirty-one".