21335725000 has 48 divisors (see below), whose sum is σ = 50002463700. Its totient is φ = 8534280000.

The previous prime is 21335724989. The next prime is 21335725001. The reversal of 21335725000 is 52753312.

It can be written as a sum of positive squares in 6 ways, for example, as 7344147204 + 13991577796 = 85698^2 + 118286^2 .

It is a super-2 number, since 2×21335725000² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21335725000.

It is not an unprimeable number, because it can be changed into a prime (21335725001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 401715 + ... + 451714.

Almost surely, 2^21335725000 is an apocalyptic number.

21335725000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21335725000 is an abundant number, since it is smaller than the sum of its proper divisors (28666738700).

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

21335725000 is an frugal number, since it uses more digits than its factorization.

21335725000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 853460 (or 853436 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 28.

The spelling of 21335725000 in words is "twenty-one billion, three hundred thirty-five million, seven hundred twenty-five thousand".