23803418621 has 2 divisors, whose sum is σ = 23803418622. Its totient is φ = 23803418620.

The previous prime is 23803418537. The next prime is 23803418623. The reversal of 23803418621 is 12681430832.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20138448100 + 3664970521 = 141910^2 + 60539^2 .

It is a cyclic number.

It is not a de Polignac number, because 23803418621 - 2¹⁰ = 23803417597 is a prime.

Together with 23803418623, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23803418623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11901709310 + 11901709311.

It is an arithmetic number, because the mean of its divisors is an integer number (11901709311).

Almost surely, 2^23803418621 is an apocalyptic number.

It is an amenable number.

23803418621 is a deficient number, since it is larger than the sum of its proper divisors (1).

23803418621 is an equidigital number, since it uses as much as digits as its factorization.

23803418621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 55296, while the sum is 38.

The spelling of 23803418621 in words is "twenty-three billion, eight hundred three million, four hundred eighteen thousand, six hundred twenty-one".