18675780919 has 2 divisors, whose sum is σ = 18675780920. Its totient is φ = 18675780918.

The previous prime is 18675780889. The next prime is 18675780961. The reversal of 18675780919 is 91908757681.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18675780919 - 2⁵ = 18675780887 is a prime.

It is a super-2 number, since 2×18675780919² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18675700919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9337890459 + 9337890460.

It is an arithmetic number, because the mean of its divisors is an integer number (9337890460).

Almost surely, 2^18675780919 is an apocalyptic number.

18675780919 is a deficient number, since it is larger than the sum of its proper divisors (1).

18675780919 is an equidigital number, since it uses as much as digits as its factorization.

18675780919 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7620480, while the sum is 61.

The spelling of 18675780919 in words is "eighteen billion, six hundred seventy-five million, seven hundred eighty thousand, nine hundred nineteen".