18902901473 has 6 divisors (see below), whose sum is σ = 19427599926. Its totient is φ = 18392010912.

The previous prime is 18902901427. The next prime is 18902901497. The reversal of 18902901473 is 37410920981.

It can be written as a sum of positive squares in 3 ways, for example, as 7775183329 + 11127718144 = 88177^2 + 105488^2 .

It is not a de Polignac number, because 18902901473 - 2²⁶ = 18835792609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18902901373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6902540 + ... + 6905277.

It is an arithmetic number, because the mean of its divisors is an integer number (3237933321).

Almost surely, 2^18902901473 is an apocalyptic number.

It is an amenable number.

18902901473 is a deficient number, since it is larger than the sum of its proper divisors (524698453).

18902901473 is an equidigital number, since it uses as much as digits as its factorization.

18902901473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13807891 (or 13807854 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 44.

The spelling of 18902901473 in words is "eighteen billion, nine hundred two million, nine hundred one thousand, four hundred seventy-three".