23267640691 has 4 divisors (see below), whose sum is σ = 23286123000. Its totient is φ = 23249158384.

The previous prime is 23267640629. The next prime is 23267640701. The reversal of 23267640691 is 19604676232.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 23267640691 - 2¹⁹ = 23267116403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23267640091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9239266 + ... + 9241783.

It is an arithmetic number, because the mean of its divisors is an integer number (5821530750).

Almost surely, 2^23267640691 is an apocalyptic number.

23267640691 is a deficient number, since it is larger than the sum of its proper divisors (18482309).

23267640691 is a wasteful number, since it uses less digits than its factorization.

23267640691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18482308.

The product of its (nonzero) digits is 653184, while the sum is 46.

The spelling of 23267640691 in words is "twenty-three billion, two hundred sixty-seven million, six hundred forty thousand, six hundred ninety-one".