23100405989 has 4 divisors (see below), whose sum is σ = 23724741324. Its totient is φ = 22476070656.

The previous prime is 23100405961. The next prime is 23100406033. The reversal of 23100405989 is 98950400132.

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

It can be written as a sum of positive squares in 2 ways, for example, as 16564977025 + 6535428964 = 128705^2 + 80842^2 .

It is a cyclic number.

It is not a de Polignac number, because 23100405989 - 2³² = 18805438693 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 (23100405929) 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, 312167612 + ... + 312167685.

It is an arithmetic number, because the mean of its divisors is an integer number (5931185331).

Almost surely, 2^23100405989 is an apocalyptic number.

It is an amenable number.

23100405989 is a deficient number, since it is larger than the sum of its proper divisors (624335335).

23100405989 is an equidigital number, since it uses as much as digits as its factorization.

23100405989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 624335334.

The product of its (nonzero) digits is 77760, while the sum is 41.

The spelling of 23100405989 in words is "twenty-three billion, one hundred million, four hundred five thousand, nine hundred eighty-nine".