18763289969 has 2 divisors, whose sum is σ = 18763289970. Its totient is φ = 18763289968.

The previous prime is 18763289953. The next prime is 18763289999. The reversal of 18763289969 is 96998236781.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15272016400 + 3491273569 = 123580^2 + 59087^2 .

It is a cyclic number.

It is not a de Polignac number, because 18763289969 - 2⁴ = 18763289953 is a prime.

It is a super-2 number, since 2×18763289969² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18763289899 and 18763289908.

It is not a weakly prime, because it can be changed into another prime (18763289999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9381644984 + 9381644985.

It is an arithmetic number, because the mean of its divisors is an integer number (9381644985).

Almost surely, 2^18763289969 is an apocalyptic number.

It is an amenable number.

18763289969 is a deficient number, since it is larger than the sum of its proper divisors (1).

18763289969 is an equidigital number, since it uses as much as digits as its factorization.

18763289969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 70543872, while the sum is 68.

The spelling of 18763289969 in words is "eighteen billion, seven hundred sixty-three million, two hundred eighty-nine thousand, nine hundred sixty-nine".