21899265024 has 792 divisors, whose sum is σ = 79662820608. Its totient is φ = 5295144960.

The previous prime is 21899264927. The next prime is 21899265029. The reversal of 21899265024 is 42056299812.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (21899265029) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 706427889 + ... + 706427919.

Almost surely, 2^21899265024 is an apocalyptic number.

21899265024 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21899265024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39831410304).

21899265024 is an abundant number, since it is smaller than the sum of its proper divisors (57763555584).

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

21899265024 is a wasteful number, since it uses less digits than its factorization.

21899265024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119 (or 75 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 48.

The spelling of 21899265024 in words is "twenty-one billion, eight hundred ninety-nine million, two hundred sixty-five thousand, twenty-four".