21052415060 has 12 divisors (see below), whose sum is σ = 44210071668. Its totient is φ = 8420966016.

The previous prime is 21052415029. The next prime is 21052415071. The reversal of 21052415060 is 6051425012.

It can be written as a sum of positive squares in 2 ways, for example, as 14121519556 + 6930895504 = 118834^2 + 83252^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 526310357 + ... + 526310396.

It is an arithmetic number, because the mean of its divisors is an integer number (3684172639).

Almost surely, 2^21052415060 is an apocalyptic number.

21052415060 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21052415060 is an abundant number, since it is smaller than the sum of its proper divisors (23157656608).

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

21052415060 is a wasteful number, since it uses less digits than its factorization.

21052415060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1052620762 (or 1052620760 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The spelling of 21052415060 in words is "twenty-one billion, fifty-two million, four hundred fifteen thousand, sixty".