21924633020 has 24 divisors (see below), whose sum is σ = 46248203904. Its totient is φ = 8730524736.

The previous prime is 21924633019. The next prime is 21924633023. The reversal of 21924633020 is 2033642912.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21924633023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2453459 + ... + 2462378.

It is an arithmetic number, because the mean of its divisors is an integer number (1927008496).

Almost surely, 2^21924633020 is an apocalyptic number.

21924633020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21924633020 is an abundant number, since it is smaller than the sum of its proper divisors (24323570884).

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

21924633020 is a wasteful number, since it uses less digits than its factorization.

21924633020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4916069 (or 4916067 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 32.

The spelling of 21924633020 in words is "twenty-one billion, nine hundred twenty-four million, six hundred thirty-three thousand, twenty".