21607525000 has 48 divisors (see below), whose sum is σ = 50639454180. Its totient is φ = 8643000000.

The previous prime is 21607524997. The next prime is 21607525019. The reversal of 21607525000 is 52570612.

It can be written as a sum of positive squares in 6 ways, for example, as 5886879076 + 15720645924 = 76726^2 + 125382^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21607525000.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 407151 + ... + 457150.

Almost surely, 2^21607525000 is an apocalyptic number.

21607525000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21607525000 is an abundant number, since it is smaller than the sum of its proper divisors (29031929180).

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

21607525000 is an frugal number, since it uses more digits than its factorization.

21607525000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 864332 (or 864308 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 28.

The spelling of 21607525000 in words is "twenty-one billion, six hundred seven million, five hundred twenty-five thousand".