21920382131 has 24 divisors (see below), whose sum is σ = 24025658832. Its totient is φ = 19929676800.

The previous prime is 21920382119. The next prime is 21920382151. The reversal of 21920382131 is 13128302912.

It is not a de Polignac number, because 21920382131 - 2¹⁰ = 21920381107 is a prime.

It is a super-2 number, since 2×21920382131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21920382101) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 14392136 + ... + 14393658.

It is an arithmetic number, because the mean of its divisors is an integer number (1001069118).

Almost surely, 2^21920382131 is an apocalyptic number.

21920382131 is a deficient number, since it is larger than the sum of its proper divisors (2105276701).

21920382131 is a wasteful number, since it uses less digits than its factorization.

21920382131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2483 (or 2452 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 32.

The spelling of 21920382131 in words is "twenty-one billion, nine hundred twenty million, three hundred eighty-two thousand, one hundred thirty-one".