21516277413712 has 40 divisors (see below), whose sum is σ = 42113466770976. Its totient is φ = 10648833887616.

The previous prime is 21516277413689. The next prime is 21516277413863. The reversal of 21516277413712 is 21731477261512.

It is a congruent number.

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, 16493298 + ... + 17749969.

Almost surely, 2^{21516277413712} is an apocalyptic number.

It is an amenable number.

21516277413712 is a deficient number, since it is larger than the sum of its proper divisors (20597189357264).

21516277413712 is a wasteful number, since it uses less digits than its factorization.

21516277413712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34243675 (or 34243669 counting only the distinct ones).

The product of its digits is 987840, while the sum is 49.

The spelling of 21516277413712 in words is "twenty-one trillion, five hundred sixteen billion, two hundred seventy-seven million, four hundred thirteen thousand, seven hundred twelve".