18900215039 has 2 divisors, whose sum is σ = 18900215040. Its totient is φ = 18900215038.

The previous prime is 18900215011. The next prime is 18900215041. The reversal of 18900215039 is 93051200981.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18900215039 - 2⁸ = 18900214783 is a prime.

Together with 18900215041, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 18900214993 and 18900215011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18900215639) 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, 9450107519 + 9450107520.

It is an arithmetic number, because the mean of its divisors is an integer number (9450107520).

Almost surely, 2^18900215039 is an apocalyptic number.

18900215039 is a deficient number, since it is larger than the sum of its proper divisors (1).

18900215039 is an equidigital number, since it uses as much as digits as its factorization.

18900215039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 38.

The spelling of 18900215039 in words is "eighteen billion, nine hundred million, two hundred fifteen thousand, thirty-nine".