21276010917 has 12 divisors (see below), whose sum is σ = 35122303840. Its totient is φ = 12157720488.

The previous prime is 21276010891. The next prime is 21276010927. The reversal of 21276010917 is 71901067212.

It is a happy number.

21276010917 is a `hidden beast` number, since 21 + 27 + 601 + 0 + 9 + 1 + 7 = 666.

It is not a de Polignac number, because 21276010917 - 2¹⁴ = 21275994533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21276010927) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 168857167 + ... + 168857292.

Almost surely, 2^21276010917 is an apocalyptic number.

It is an amenable number.

21276010917 is a deficient number, since it is larger than the sum of its proper divisors (13846292923).

21276010917 is a wasteful number, since it uses less digits than its factorization.

21276010917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337714472 (or 337714469 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 36.

The spelling of 21276010917 in words is "twenty-one billion, two hundred seventy-six million, ten thousand, nine hundred seventeen".