21160634460 has 48 divisors (see below), whose sum is σ = 67714031616. Its totient is φ = 4836716352.

The previous prime is 21160634431. The next prime is 21160634471. The reversal of 21160634460 is 6443606112.

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 15 ways as a sum of consecutive naturals, for example, 25190812 + ... + 25191651.

It is an arithmetic number, because the mean of its divisors is an integer number (1410708992).

Almost surely, 2^21160634460 is an apocalyptic number.

21160634460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21160634460 is an abundant number, since it is smaller than the sum of its proper divisors (46553397156).

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

21160634460 is a wasteful number, since it uses less digits than its factorization.

21160634460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50382482 (or 50382480 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 33.

The spelling of 21160634460 in words is "twenty-one billion, one hundred sixty million, six hundred thirty-four thousand, four hundred sixty".