21126607695 has 12 divisors (see below), whose sum is σ = 36619453416. Its totient is φ = 11267524080.

The previous prime is 21126607631. The next prime is 21126607709. The reversal of 21126607695 is 59670662112.

21126607695 is a `hidden beast` number, since 2 + 11 + 26 + 607 + 6 + 9 + 5 = 666.

It is not a de Polignac number, because 21126607695 - 2⁶ = 21126607631 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 469480171 = 21126607695 / (2 + 1 + 1 + 2 + 6 + 6 + 0 + 7 + 6 + 9 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 21126607695.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 234740041 + ... + 234740130.

It is an arithmetic number, because the mean of its divisors is an integer number (3051621118).

Almost surely, 2^21126607695 is an apocalyptic number.

21126607695 is a deficient number, since it is larger than the sum of its proper divisors (15492845721).

21126607695 is a wasteful number, since it uses less digits than its factorization.

21126607695 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469480182 (or 469480179 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The spelling of 21126607695 in words is "twenty-one billion, one hundred twenty-six million, six hundred seven thousand, six hundred ninety-five".