23018300621 has 4 divisors (see below), whose sum is σ = 23640416892. Its totient is φ = 22396184352.

The previous prime is 23018300593. The next prime is 23018300659. The reversal of 23018300621 is 12600381032.

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 21370346596 + 1647954025 = 146186^2 + 40595^2 .

It is a cyclic number.

It is not a de Polignac number, because 23018300621 - 2¹⁰ = 23018299597 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 (23018300021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 311058080 + ... + 311058153.

It is an arithmetic number, because the mean of its divisors is an integer number (5910104223).

Almost surely, 2^23018300621 is an apocalyptic number.

It is an amenable number.

23018300621 is a deficient number, since it is larger than the sum of its proper divisors (622116271).

23018300621 is an equidigital number, since it uses as much as digits as its factorization.

23018300621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622116270.

The product of its (nonzero) digits is 1728, while the sum is 26.

Adding to 23018300621 its reverse (12600381032), we get a palindrome (35618681653).

The spelling of 23018300621 in words is "twenty-three billion, eighteen million, three hundred thousand, six hundred twenty-one".