21150253000 has 32 divisors (see below), whose sum is σ = 49491594360. Its totient is φ = 8460100800.

The previous prime is 21150252953. The next prime is 21150253013. The reversal of 21150253000 is 35205112.

It can be written as a sum of positive squares in 4 ways, for example, as 13894279876 + 7255973124 = 117874^2 + 85182^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10574127 + ... + 10576126.

Almost surely, 2^21150253000 is an apocalyptic number.

21150253000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21150253000 is an abundant number, since it is smaller than the sum of its proper divisors (28341341360).

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

21150253000 is a wasteful number, since it uses less digits than its factorization.

21150253000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21150274 (or 21150260 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 19.

Adding to 21150253000 its reverse (35205112), we get a palindrome (21185458112).

The spelling of 21150253000 in words is "twenty-one billion, one hundred fifty million, two hundred fifty-three thousand".