18998692844969 has 2 divisors, whose sum is σ = 18998692844970. Its totient is φ = 18998692844968.

The previous prime is 18998692844951. The next prime is 18998692844981. The reversal of 18998692844969 is 96944829689981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9606993235225 + 9391699609744 = 3099515^2 + 3064588^2 .

It is a cyclic number.

It is not a de Polignac number, because 18998692844969 - 2²⁸ = 18998424409513 is a prime.

It is a super-2 number, since 2×18998692844969² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18998692844569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9499346422484 + 9499346422485.

It is an arithmetic number, because the mean of its divisors is an integer number (9499346422485).

Almost surely, 2^{18998692844969} is an apocalyptic number.

It is an amenable number.

18998692844969 is a deficient number, since it is larger than the sum of its proper divisors (1).

18998692844969 is an equidigital number, since it uses as much as digits as its factorization.

18998692844969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34828517376, while the sum is 92.

The spelling of 18998692844969 in words is "eighteen trillion, nine hundred ninety-eight billion, six hundred ninety-two million, eight hundred forty-four thousand, nine hundred sixty-nine".