21097330695 has 48 divisors (see below), whose sum is σ = 41803107840. Its totient is φ = 9642117312.

The previous prime is 21097330687. The next prime is 21097330721. The reversal of 21097330695 is 59603379012.

It is not a de Polignac number, because 21097330695 - 2³ = 21097330687 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 21097330695.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2259246 + ... + 2268564.

It is an arithmetic number, because the mean of its divisors is an integer number (870898080).

Almost surely, 2^21097330695 is an apocalyptic number.

21097330695 is a deficient number, since it is larger than the sum of its proper divisors (20705777145).

21097330695 is a wasteful number, since it uses less digits than its factorization.

21097330695 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16524 (or 16521 counting only the distinct ones).

The product of its (nonzero) digits is 306180, while the sum is 45.

The spelling of 21097330695 in words is "twenty-one billion, ninety-seven million, three hundred thirty thousand, six hundred ninety-five".