18993090539 has 2 divisors, whose sum is σ = 18993090540. Its totient is φ = 18993090538.

The previous prime is 18993090499. The next prime is 18993090541. The reversal of 18993090539 is 93509039981.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18993090539 - 2³² = 14698123243 is a prime.

Together with 18993090541, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18993090559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9496545269 + 9496545270.

It is an arithmetic number, because the mean of its divisors is an integer number (9496545270).

Almost surely, 2^18993090539 is an apocalyptic number.

18993090539 is a deficient number, since it is larger than the sum of its proper divisors (1).

18993090539 is an equidigital number, since it uses as much as digits as its factorization.

18993090539 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2361960, while the sum is 56.

The spelling of 18993090539 in words is "eighteen billion, nine hundred ninety-three million, ninety thousand, five hundred thirty-nine".