18850404619 has 2 divisors, whose sum is σ = 18850404620. Its totient is φ = 18850404618.

The previous prime is 18850404581. The next prime is 18850404623. The reversal of 18850404619 is 91640405881.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18850404619 - 2³³ = 10260470027 is a prime.

It is a super-2 number, since 2×18850404619² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18850404649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9425202309 + 9425202310.

It is an arithmetic number, because the mean of its divisors is an integer number (9425202310).

Almost surely, 2^18850404619 is an apocalyptic number.

18850404619 is a deficient number, since it is larger than the sum of its proper divisors (1).

18850404619 is an equidigital number, since it uses as much as digits as its factorization.

18850404619 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 276480, while the sum is 46.

The spelling of 18850404619 in words is "eighteen billion, eight hundred fifty million, four hundred four thousand, six hundred nineteen".