21902148320 has 48 divisors (see below), whose sum is σ = 55724124960. Its totient is φ = 8086946304.

The previous prime is 21902148313. The next prime is 21902148377. The reversal of 21902148320 is 2384120912.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5262860 + ... + 5267019.

It is an arithmetic number, because the mean of its divisors is an integer number (1160919270).

Almost surely, 2^21902148320 is an apocalyptic number.

21902148320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21902148320 is an abundant number, since it is smaller than the sum of its proper divisors (33821976640).

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

21902148320 is a wasteful number, since it uses less digits than its factorization.

21902148320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10529907 (or 10529899 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The spelling of 21902148320 in words is "twenty-one billion, nine hundred two million, one hundred forty-eight thousand, three hundred twenty".