21460477672 has 16 divisors (see below), whose sum is σ = 40348042560. Its totient is φ = 10700999664.

The previous prime is 21460477667. The next prime is 21460477691. The reversal of 21460477672 is 27677406412.

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, 3651778 + ... + 3657649.

It is an arithmetic number, because the mean of its divisors is an integer number (2521752660).

Almost surely, 2^21460477672 is an apocalyptic number.

It is an amenable number.

21460477672 is a deficient number, since it is larger than the sum of its proper divisors (18887564888).

21460477672 is a wasteful number, since it uses less digits than its factorization.

21460477672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7309800 (or 7309796 counting only the distinct ones).

The product of its (nonzero) digits is 790272, while the sum is 46.

The spelling of 21460477672 in words is "twenty-one billion, four hundred sixty million, four hundred seventy-seven thousand, six hundred seventy-two".