18449692785 has 80 divisors (see below), whose sum is σ = 34206796800. Its totient is φ = 9507798144.

The previous prime is 18449692771. The next prime is 18449692801. The reversal of 18449692785 is 58729694481.

It is not a de Polignac number, because 18449692785 - 2⁴ = 18449692769 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1497631 + ... + 1509899.

It is an arithmetic number, because the mean of its divisors is an integer number (427584960).

Almost surely, 2^18449692785 is an apocalyptic number.

18449692785 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18449692785 is a deficient number, since it is larger than the sum of its proper divisors (15757104015).

18449692785 is a wasteful number, since it uses less digits than its factorization.

18449692785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12412 (or 12403 counting only the distinct ones).

The product of its digits is 34836480, while the sum is 63.

The spelling of 18449692785 in words is "eighteen billion, four hundred forty-nine million, six hundred ninety-two thousand, seven hundred eighty-five".