21459065912 has 16 divisors (see below), whose sum is σ = 40237509840. Its totient is φ = 10729063296.

The previous prime is 21459065897. The next prime is 21459066043. The reversal of 21459065912 is 21956095412.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

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, 205328 + ... + 291680.

It is an arithmetic number, because the mean of its divisors is an integer number (2514844365).

Almost surely, 2^21459065912 is an apocalyptic number.

It is an amenable number.

21459065912 is a deficient number, since it is larger than the sum of its proper divisors (18778443928).

21459065912 is a wasteful number, since it uses less digits than its factorization.

21459065912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117422 (or 117418 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 44.

The spelling of 21459065912 in words is "twenty-one billion, four hundred fifty-nine million, sixty-five thousand, nine hundred twelve".