21884520631 has 8 divisors (see below), whose sum is σ = 24179317344. Its totient is φ = 19701665280.

The previous prime is 21884520617. The next prime is 21884520643. The reversal of 21884520631 is 13602548812.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21884520631 - 2²³ = 21876132023 is a prime.

It is a super-2 number, since 2×21884520631² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21884520611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27984930 + ... + 27985711.

It is an arithmetic number, because the mean of its divisors is an integer number (3022414668).

Almost surely, 2^21884520631 is an apocalyptic number.

21884520631 is a deficient number, since it is larger than the sum of its proper divisors (2294796713).

21884520631 is a wasteful number, since it uses less digits than its factorization.

21884520631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55970681.

The product of its (nonzero) digits is 92160, while the sum is 40.

The spelling of 21884520631 in words is "twenty-one billion, eight hundred eighty-four million, five hundred twenty thousand, six hundred thirty-one".