21934559600 has 90 divisors (see below), whose sum is σ = 53028979440. Its totient is φ = 8718872960.

The previous prime is 21934559599. The next prime is 21934559627. The reversal of 21934559600 is 695543912.

It is a super-2 number, since 2×21934559600² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 45792161 + ... + 45792639.

Almost surely, 2^21934559600 is an apocalyptic number.

21934559600 is a gapful number since it is divisible by the number (20) 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 21934559600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26514489720).

21934559600 is an abundant number, since it is smaller than the sum of its proper divisors (31094419840).

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

21934559600 is an equidigital number, since it uses as much as digits as its factorization.

21934559600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1215 (or 725 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 44.

The spelling of 21934559600 in words is "twenty-one billion, nine hundred thirty-four million, five hundred fifty-nine thousand, six hundred".