21014514660 has 24 divisors (see below), whose sum is σ = 58840641216. Its totient is φ = 5603870560.

The previous prime is 21014514629. The next prime is 21014514683. The reversal of 21014514660 is 6641541012.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 175120896 + ... + 175121015.

It is an arithmetic number, because the mean of its divisors is an integer number (2451693384).

Almost surely, 2^21014514660 is an apocalyptic number.

21014514660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21014514660 is an abundant number, since it is smaller than the sum of its proper divisors (37826126556).

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

21014514660 is a wasteful number, since it uses less digits than its factorization.

21014514660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350241923 (or 350241921 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The spelling of 21014514660 in words is "twenty-one billion, fourteen million, five hundred fourteen thousand, six hundred sixty".