21973598320 has 40 divisors (see below), whose sum is σ = 53309864736. Its totient is φ = 8407289088.

The previous prime is 21973598267. The next prime is 21973598347. The reversal of 21973598320 is 2389537912.

It is a tau number, because it is divible by the number of its divisors (40).

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, 5969247 + ... + 5972926.

Almost surely, 2^21973598320 is an apocalyptic number.

21973598320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21973598320 is an abundant number, since it is smaller than the sum of its proper divisors (31336266416).

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

21973598320 is a wasteful number, since it uses less digits than its factorization.

21973598320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11942209 (or 11942203 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 49.

The spelling of 21973598320 in words is "twenty-one billion, nine hundred seventy-three million, five hundred ninety-eight thousand, three hundred twenty".