21241572460 has 12 divisors (see below), whose sum is σ = 44607302208. Its totient is φ = 8496628976.

The previous prime is 21241572427. The next prime is 21241572487. The reversal of 21241572460 is 6427514212.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 531039292 + ... + 531039331.

It is an arithmetic number, because the mean of its divisors is an integer number (3717275184).

Almost surely, 2^21241572460 is an apocalyptic number.

21241572460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21241572460 is an abundant number, since it is smaller than the sum of its proper divisors (23365729748).

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

21241572460 is a wasteful number, since it uses less digits than its factorization.

21241572460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1062078632 (or 1062078630 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 34.

The spelling of 21241572460 in words is "twenty-one billion, two hundred forty-one million, five hundred seventy-two thousand, four hundred sixty".