22809657687 has 4 divisors (see below), whose sum is σ = 30412876920. Its totient is φ = 15206438456.

The previous prime is 22809657641. The next prime is 22809657701. The reversal of 22809657687 is 78675690822.

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 22809657687 - 2¹⁶ = 22809592151 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22809657687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22809650687) 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, 3801609612 + ... + 3801609617.

It is an arithmetic number, because the mean of its divisors is an integer number (7603219230).

Almost surely, 2^22809657687 is an apocalyptic number.

22809657687 is a deficient number, since it is larger than the sum of its proper divisors (7603219233).

22809657687 is an equidigital number, since it uses as much as digits as its factorization.

22809657687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7603219232.

The product of its (nonzero) digits is 20321280, while the sum is 60.

The spelling of 22809657687 in words is "twenty-two billion, eight hundred nine million, six hundred fifty-seven thousand, six hundred eighty-seven".