21470017102645 has 32 divisors (see below), whose sum is σ = 25909312447872. Its totient is φ = 17079431411712.

The previous prime is 21470017102637. The next prime is 21470017102727. The reversal of 21470017102645 is 54620171007412.

It is a cyclic number.

It is not a de Polignac number, because 21470017102645 - 2³ = 21470017102637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21470017102598 and 21470017102607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3981087069 + ... + 3981092461.

It is an arithmetic number, because the mean of its divisors is an integer number (809666013996).

Almost surely, 2^{21470017102645} is an apocalyptic number.

It is an amenable number.

21470017102645 is a deficient number, since it is larger than the sum of its proper divisors (4439295345227).

21470017102645 is a wasteful number, since it uses less digits than its factorization.

21470017102645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11061.

The product of its (nonzero) digits is 94080, while the sum is 40.

The spelling of 21470017102645 in words is "twenty-one trillion, four hundred seventy billion, seventeen million, one hundred two thousand, six hundred forty-five".