23811450491 has 4 divisors (see below), whose sum is σ = 23811981984. Its totient is φ = 23810919000.

The previous prime is 23811450449. The next prime is 23811450497. The reversal of 23811450491 is 19405411832.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23811450491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23811450497) 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, 191660 + ... + 290441.

It is an arithmetic number, because the mean of its divisors is an integer number (5952995496).

Almost surely, 2^23811450491 is an apocalyptic number.

23811450491 is a deficient number, since it is larger than the sum of its proper divisors (531493).

23811450491 is an equidigital number, since it uses as much as digits as its factorization.

23811450491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 531492.

The product of its (nonzero) digits is 34560, while the sum is 38.

The spelling of 23811450491 in words is "twenty-three billion, eight hundred eleven million, four hundred fifty thousand, four hundred ninety-one".