21292934860 has 24 divisors (see below), whose sum is σ = 47345467680. Its totient is φ = 8016163584.

The previous prime is 21292934771. The next prime is 21292934863. The reversal of 21292934860 is 6843929212.

It is a self number, because there is not a number n which added to its sum of digits gives 21292934860.

It is not an unprimeable number, because it can be changed into a prime (21292934863) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 31312800 + ... + 31313479.

It is an arithmetic number, because the mean of its divisors is an integer number (1972727820).

Almost surely, 2^21292934860 is an apocalyptic number.

21292934860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21292934860 is an abundant number, since it is smaller than the sum of its proper divisors (26052532820).

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

21292934860 is a wasteful number, since it uses less digits than its factorization.

21292934860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62626305 (or 62626303 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 46.

The spelling of 21292934860 in words is "twenty-one billion, two hundred ninety-two million, nine hundred thirty-four thousand, eight hundred sixty".