18889874425 has 12 divisors (see below), whose sum is σ = 23865397740. Its totient is φ = 14826768320.

The previous prime is 18889874383. The next prime is 18889874429. The reversal of 18889874425 is 52447898881.

It can be written as a sum of positive squares in 6 ways, for example, as 718025616 + 18171848809 = 26796^2 + 134803^2 .

It is a de Polignac number, because none of the positive numbers 2^k-18889874425 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18889874429) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7126930 + ... + 7129579.

It is an arithmetic number, because the mean of its divisors is an integer number (1988783145).

Almost surely, 2^18889874425 is an apocalyptic number.

It is an amenable number.

18889874425 is a deficient number, since it is larger than the sum of its proper divisors (4975523315).

18889874425 is a wasteful number, since it uses less digits than its factorization.

18889874425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14256572 (or 14256567 counting only the distinct ones).

The product of its digits is 41287680, while the sum is 64.

The spelling of 18889874425 in words is "eighteen billion, eight hundred eighty-nine million, eight hundred seventy-four thousand, four hundred twenty-five".