21410271647 has 2 divisors, whose sum is σ = 21410271648. Its totient is φ = 21410271646.

The previous prime is 21410271611. The next prime is 21410271683. The reversal of 21410271647 is 74617201412.

It is a balanced prime because it is at equal distance from previous prime (21410271611) and next prime (21410271683).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21410271647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21410271247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10705135823 + 10705135824.

It is an arithmetic number, because the mean of its divisors is an integer number (10705135824).

Almost surely, 2^21410271647 is an apocalyptic number.

21410271647 is a deficient number, since it is larger than the sum of its proper divisors (1).

21410271647 is an equidigital number, since it uses as much as digits as its factorization.

21410271647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18816, while the sum is 35.

The spelling of 21410271647 in words is "twenty-one billion, four hundred ten million, two hundred seventy-one thousand, six hundred forty-seven".