18807742285 has 4 divisors (see below), whose sum is σ = 22569290748. Its totient is φ = 15046193824.

The previous prime is 18807742279. The next prime is 18807742319. The reversal of 18807742285 is 58224770881.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58224770881 = 2927 ⋅19892303.

It can be written as a sum of positive squares in 2 ways, for example, as 3015547396 + 15792194889 = 54914^2 + 125667^2 .

It is a cyclic number.

It is not a de Polignac number, because 18807742285 - 2⁹ = 18807741773 is a prime.

It is a Duffinian number.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 1880774224 + ... + 1880774233.

It is an arithmetic number, because the mean of its divisors is an integer number (5642322687).

Almost surely, 2^18807742285 is an apocalyptic number.

It is an amenable number.

18807742285 is a deficient number, since it is larger than the sum of its proper divisors (3761548463).

18807742285 is an equidigital number, since it uses as much as digits as its factorization.

18807742285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3761548462.

The product of its (nonzero) digits is 2007040, while the sum is 52.

The spelling of 18807742285 in words is "eighteen billion, eight hundred seven million, seven hundred forty-two thousand, two hundred eighty-five".