23638206493 has 4 divisors (see below), whose sum is σ = 25787134368. Its totient is φ = 21489278620.

The previous prime is 23638206481. The next prime is 23638206497. The reversal of 23638206493 is 39460283632.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23638206493 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 (23638206497) 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, 1074463921 + ... + 1074463942.

It is an arithmetic number, because the mean of its divisors is an integer number (6446783592).

Almost surely, 2^23638206493 is an apocalyptic number.

It is an amenable number.

23638206493 is a deficient number, since it is larger than the sum of its proper divisors (2148927875).

23638206493 is a wasteful number, since it uses less digits than its factorization.

23638206493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2148927874.

The product of its (nonzero) digits is 1119744, while the sum is 46.

The spelling of 23638206493 in words is "twenty-three billion, six hundred thirty-eight million, two hundred six thousand, four hundred ninety-three".