21759290580 has 48 divisors (see below), whose sum is σ = 64132649280. Its totient is φ = 5497083648.

The previous prime is 21759290557. The next prime is 21759290587. The reversal of 21759290580 is 8509295712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21759290587) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9542409 + ... + 9544688.

It is an arithmetic number, because the mean of its divisors is an integer number (1336096860).

Almost surely, 2^21759290580 is an apocalyptic number.

21759290580 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21759290580 is an abundant number, since it is smaller than the sum of its proper divisors (42373358700).

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

21759290580 is a wasteful number, since it uses less digits than its factorization.

21759290580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19087128 (or 19087126 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 48.

The spelling of 21759290580 in words is "twenty-one billion, seven hundred fifty-nine million, two hundred ninety thousand, five hundred eighty".