18858983225 has 12 divisors (see below), whose sum is σ = 23407212780. Its totient is φ = 15072945600.

The previous prime is 18858983189. The next prime is 18858983263. The reversal of 18858983225 is 52238985881.

It can be written as a sum of positive squares in 6 ways, for example, as 1420988416 + 17437994809 = 37696^2 + 132053^2 .

It is not a de Polignac number, because 18858983225 - 2⁶ = 18858983161 is a prime.

It is a super-2 number, since 2×18858983225² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 328970 + ... + 382019.

It is an arithmetic number, because the mean of its divisors is an integer number (1950601065).

Almost surely, 2^18858983225 is an apocalyptic number.

It is an amenable number.

18858983225 is a deficient number, since it is larger than the sum of its proper divisors (4548229555).

18858983225 is a wasteful number, since it uses less digits than its factorization.

18858983225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 712060 (or 712055 counting only the distinct ones).

The product of its digits is 11059200, while the sum is 59.

The spelling of 18858983225 in words is "eighteen billion, eight hundred fifty-eight million, nine hundred eighty-three thousand, two hundred twenty-five".