18249854977 has 8 divisors (see below), whose sum is σ = 20340396000. Its totient is φ = 16272316224.

The previous prime is 18249854971. The next prime is 18249855059. The reversal of 18249854977 is 77945894281.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-18249854977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18249854971) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28250227 + ... + 28250872.

It is an arithmetic number, because the mean of its divisors is an integer number (2542549500).

Almost surely, 2^18249854977 is an apocalyptic number.

18249854977 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

18249854977 is a deficient number, since it is larger than the sum of its proper divisors (2090541023).

18249854977 is a wasteful number, since it uses less digits than its factorization.

18249854977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56501135.

The product of its digits is 40642560, while the sum is 64.

The spelling of 18249854977 in words is "eighteen billion, two hundred forty-nine million, eight hundred fifty-four thousand, nine hundred seventy-seven".