18793642969 has 2 divisors, whose sum is σ = 18793642970. Its totient is φ = 18793642968.

The previous prime is 18793642883. The next prime is 18793642981. The reversal of 18793642969 is 96924639781.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13951153225 + 4842489744 = 118115^2 + 69588^2 .

It is a cyclic number.

It is not a de Polignac number, because 18793642969 - 2¹⁹ = 18793118681 is a prime.

It is a super-2 number, since 2×18793642969² (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 18793642969.

It is not a weakly prime, because it can be changed into another prime (18793640969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9396821484 + 9396821485.

It is an arithmetic number, because the mean of its divisors is an integer number (9396821485).

Almost surely, 2^18793642969 is an apocalyptic number.

It is an amenable number.

18793642969 is a deficient number, since it is larger than the sum of its proper divisors (1).

18793642969 is an equidigital number, since it uses as much as digits as its factorization.

18793642969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 35271936, while the sum is 64.

The spelling of 18793642969 in words is "eighteen billion, seven hundred ninety-three million, six hundred forty-two thousand, nine hundred sixty-nine".