21470071664053 has 2 divisors, whose sum is σ = 21470071664054. Its totient is φ = 21470071664052.

The previous prime is 21470071664039. The next prime is 21470071664113. The reversal of 21470071664053 is 35046617007412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19471374119044 + 1998697545009 = 4412638^2 + 1413753^2 .

It is a cyclic number.

It is not a de Polignac number, because 21470071664053 - 2²¹ = 21470069566901 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21470071663994 and 21470071664012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21470071664033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10735035832026 + 10735035832027.

It is an arithmetic number, because the mean of its divisors is an integer number (10735035832027).

Almost surely, 2^{21470071664053} is an apocalyptic number.

It is an amenable number.

21470071664053 is a deficient number, since it is larger than the sum of its proper divisors (1).

21470071664053 is an equidigital number, since it uses as much as digits as its factorization.

21470071664053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 846720, while the sum is 46.

The spelling of 21470071664053 in words is "twenty-one trillion, four hundred seventy billion, seventy-one million, six hundred sixty-four thousand, fifty-three".