21263179160 has 16 divisors (see below), whose sum is σ = 47842153200. Its totient is φ = 8505271648.

The previous prime is 21263179139. The next prime is 21263179241. The reversal of 21263179160 is 6197136212.

It is a congruent number.

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, 265789700 + ... + 265789779.

It is an arithmetic number, because the mean of its divisors is an integer number (2990134575).

Almost surely, 2^21263179160 is an apocalyptic number.

21263179160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21263179160 is an abundant number, since it is smaller than the sum of its proper divisors (26578974040).

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

21263179160 is a wasteful number, since it uses less digits than its factorization.

21263179160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 531579490 (or 531579486 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 38.

The spelling of 21263179160 in words is "twenty-one billion, two hundred sixty-three million, one hundred seventy-nine thousand, one hundred sixty".