21656060657014 has 16 divisors (see below), whose sum is σ = 37571960659968. Its totient is φ = 9169347541032.

The previous prime is 21656060656999. The next prime is 21656060657029. The reversal of 21656060657014 is 41075606065612.

It is an interprime number because it is at equal distance from previous prime (21656060656999) and next prime (21656060657029).

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, 9318441462 + ... + 9318443785.

It is an arithmetic number, because the mean of its divisors is an integer number (2348247541248).

Almost surely, 2^{21656060657014} is an apocalyptic number.

21656060657014 is a deficient number, since it is larger than the sum of its proper divisors (15915900002954).

21656060657014 is a wasteful number, since it uses less digits than its factorization.

21656060657014 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18636885339.

The product of its (nonzero) digits is 1814400, while the sum is 49.

The spelling of 21656060657014 in words is "twenty-one trillion, six hundred fifty-six billion, sixty million, six hundred fifty-seven thousand, fourteen".