18662904919 has 2 divisors, whose sum is σ = 18662904920. Its totient is φ = 18662904918.

The previous prime is 18662904851. The next prime is 18662904971. The reversal of 18662904919 is 91940926681.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18662904919 is a prime.

It is a super-2 number, since 2×18662904919² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18662904919.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18662904979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9331452459 + 9331452460.

It is an arithmetic number, because the mean of its divisors is an integer number (9331452460).

Almost surely, 2^18662904919 is an apocalyptic number.

18662904919 is a deficient number, since it is larger than the sum of its proper divisors (1).

18662904919 is an equidigital number, since it uses as much as digits as its factorization.

18662904919 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1679616, while the sum is 55.

The spelling of 18662904919 in words is "eighteen billion, six hundred sixty-two million, nine hundred four thousand, nine hundred nineteen".