21924724371 has 32 divisors (see below), whose sum is σ = 32455779840. Its totient is φ = 13052755200.

The previous prime is 21924724357. The next prime is 21924724387. The reversal of 21924724371 is 17342742912.

It is not a de Polignac number, because 21924724371 - 2⁶ = 21924724307 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21924724351) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1621786 + ... + 1635248.

It is an arithmetic number, because the mean of its divisors is an integer number (1014243120).

Almost surely, 2^21924724371 is an apocalyptic number.

21924724371 is a deficient number, since it is larger than the sum of its proper divisors (10531055469).

21924724371 is a wasteful number, since it uses less digits than its factorization.

21924724371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14347.

The product of its digits is 169344, while the sum is 42.

The spelling of 21924724371 in words is "twenty-one billion, nine hundred twenty-four million, seven hundred twenty-four thousand, three hundred seventy-one".