18860984397 has 12 divisors (see below), whose sum is σ = 27549753660. Its totient is φ = 12432708288.

The previous prime is 18860984383. The next prime is 18860984413. The reversal of 18860984397 is 79348906881.

18860984397 is a `hidden beast` number, since 18 + 8 + 609 + 8 + 4 + 3 + 9 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2533511556 + 16327472841 = 50334^2 + 127779^2 .

It is not a de Polignac number, because 18860984397 - 2⁷ = 18860984269 is a prime.

It is a hoax number, since the sum of its digits (63) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18860984327) 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, 11772598 + ... + 11774199.

It is an arithmetic number, because the mean of its divisors is an integer number (2295812805).

Almost surely, 2^18860984397 is an apocalyptic number.

It is an amenable number.

18860984397 is a deficient number, since it is larger than the sum of its proper divisors (8688769263).

18860984397 is a wasteful number, since it uses less digits than its factorization.

18860984397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23546892 (or 23546889 counting only the distinct ones).

The product of its (nonzero) digits is 20901888, while the sum is 63.

The spelling of 18860984397 in words is "eighteen billion, eight hundred sixty million, nine hundred eighty-four thousand, three hundred ninety-seven".