21470013564651 has 48 divisors (see below), whose sum is σ = 34066461911040. Its totient is φ = 12969425462400.

The previous prime is 21470013564487. The next prime is 21470013564683. The reversal of 21470013564651 is 15646531007412.

It is a happy number.

21470013564651 is a `hidden beast` number, since 2 + 1 + 4 + 70 + 0 + 13 + 564 + 6 + 5 + 1 = 666.

It is not a de Polignac number, because 21470013564651 - 2¹⁷ = 21470013433579 is a prime.

It is a super-2 number, since 2×21470013564651² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21470013564597 and 21470013564606.

It is not an unprimeable number, because it can be changed into a prime (21470013164651) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 51515335 + ... + 51930431.

It is an arithmetic number, because the mean of its divisors is an integer number (709717956480).

Almost surely, 2^{21470013564651} is an apocalyptic number.

21470013564651 is a deficient number, since it is larger than the sum of its proper divisors (12596448346389).

21470013564651 is a wasteful number, since it uses less digits than its factorization.

21470013564651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428296 (or 428293 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 45.

The spelling of 21470013564651 in words is "twenty-one trillion, four hundred seventy billion, thirteen million, five hundred sixty-four thousand, six hundred fifty-one".