18538958023 has 2 divisors, whose sum is σ = 18538958024. Its totient is φ = 18538958022.

The previous prime is 18538958021. The next prime is 18538958041. The reversal of 18538958023 is 32085983581.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18538958023 - 2¹ = 18538958021 is a prime.

Together with 18538958021, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18538958021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9269479011 + 9269479012.

It is an arithmetic number, because the mean of its divisors is an integer number (9269479012).

Almost surely, 2^18538958023 is an apocalyptic number.

18538958023 is a deficient number, since it is larger than the sum of its proper divisors (1).

18538958023 is an equidigital number, since it uses as much as digits as its factorization.

18538958023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2073600, while the sum is 52.

The spelling of 18538958023 in words is "eighteen billion, five hundred thirty-eight million, nine hundred fifty-eight thousand, twenty-three".