18904846469 has 2 divisors, whose sum is σ = 18904846470. Its totient is φ = 18904846468.

The previous prime is 18904846463. The next prime is 18904846483. The reversal of 18904846469 is 96464840981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12594450625 + 6310395844 = 112225^2 + 79438^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18904846469 is a prime.

It is a super-2 number, since 2×18904846469² (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 (18904846463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9452423234 + 9452423235.

It is an arithmetic number, because the mean of its divisors is an integer number (9452423235).

Almost surely, 2^18904846469 is an apocalyptic number.

It is an amenable number.

18904846469 is a deficient number, since it is larger than the sum of its proper divisors (1).

18904846469 is an equidigital number, since it uses as much as digits as its factorization.

18904846469 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11943936, while the sum is 59.

The spelling of 18904846469 in words is "eighteen billion, nine hundred four million, eight hundred forty-six thousand, four hundred sixty-nine".