18650899819 has 2 divisors, whose sum is σ = 18650899820. Its totient is φ = 18650899818.

The previous prime is 18650899807. The next prime is 18650899831. The reversal of 18650899819 is 91899805681.

It is a balanced prime because it is at equal distance from previous prime (18650899807) and next prime (18650899831).

It is a cyclic number.

It is not a de Polignac number, because 18650899819 - 2¹⁵ = 18650867051 is a prime.

It is a super-2 number, since 2×18650899819² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18650899849) 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, 9325449909 + 9325449910.

It is an arithmetic number, because the mean of its divisors is an integer number (9325449910).

Almost surely, 2^18650899819 is an apocalyptic number.

18650899819 is a deficient number, since it is larger than the sum of its proper divisors (1).

18650899819 is an equidigital number, since it uses as much as digits as its factorization.

18650899819 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11197440, while the sum is 64.

The spelling of 18650899819 in words is "eighteen billion, six hundred fifty million, eight hundred ninety-nine thousand, eight hundred nineteen".