18835887923 has 2 divisors, whose sum is σ = 18835887924. Its totient is φ = 18835887922.

The previous prime is 18835887877. The next prime is 18835887949. The reversal of 18835887923 is 32978853881.

It is a strong prime.

It is an emirp because it is prime and its reverse (32978853881) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18835887923 - 2⁸ = 18835887667 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (18835881923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9417943961 + 9417943962.

It is an arithmetic number, because the mean of its divisors is an integer number (9417943962).

Almost surely, 2^18835887923 is an apocalyptic number.

18835887923 is a deficient number, since it is larger than the sum of its proper divisors (1).

18835887923 is an equidigital number, since it uses as much as digits as its factorization.

18835887923 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23224320, while the sum is 62.

The spelling of 18835887923 in words is "eighteen billion, eight hundred thirty-five million, eight hundred eighty-seven thousand, nine hundred twenty-three".