18514739989 has 2 divisors, whose sum is σ = 18514739990. Its totient is φ = 18514739988.

The previous prime is 18514739953. The next prime is 18514739993. The reversal of 18514739989 is 98993741581.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12592206225 + 5922533764 = 112215^2 + 76958^2 .

It is a cyclic number.

It is not a de Polignac number, because 18514739989 - 2¹⁵ = 18514707221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18514739989.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18514739689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9257369994 + 9257369995.

It is an arithmetic number, because the mean of its divisors is an integer number (9257369995).

Almost surely, 2^18514739989 is an apocalyptic number.

It is an amenable number.

18514739989 is a deficient number, since it is larger than the sum of its proper divisors (1).

18514739989 is an equidigital number, since it uses as much as digits as its factorization.

18514739989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19595520, while the sum is 64.

The spelling of 18514739989 in words is "eighteen billion, five hundred fourteen million, seven hundred thirty-nine thousand, nine hundred eighty-nine".