21999716000 has 48 divisors (see below), whose sum is σ = 54053312040. Its totient is φ = 8799884800.

The previous prime is 21999715987. The next prime is 21999716009. The reversal of 21999716000 is 61799912.

It can be written as a sum of positive squares in 4 ways, for example, as 4226560144 + 17773155856 = 65012^2 + 133316^2 .

It is not an unprimeable number, because it can be changed into a prime (21999716009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2745965 + ... + 2753964.

Almost surely, 2^21999716000 is an apocalyptic number.

21999716000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21999716000 is an abundant number, since it is smaller than the sum of its proper divisors (32053596040).

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

21999716000 is an equidigital number, since it uses as much as digits as its factorization.

21999716000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5499954 (or 5499936 counting only the distinct ones).

The product of its (nonzero) digits is 61236, while the sum is 44.

The spelling of 21999716000 in words is "twenty-one billion, nine hundred ninety-nine million, seven hundred sixteen thousand".