18112520177 has 4 divisors (see below), whose sum is σ = 18131251776. Its totient is φ = 18093788580.

The previous prime is 18112520149. The next prime is 18112520197. The reversal of 18112520177 is 77102521181.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18112520177 - 2²⁴ = 18095742961 is a prime.

It is a super-2 number, since 2×18112520177² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18112520197) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9364349 + ... + 9366282.

It is an arithmetic number, because the mean of its divisors is an integer number (4532812944).

Almost surely, 2^18112520177 is an apocalyptic number.

It is an amenable number.

18112520177 is a deficient number, since it is larger than the sum of its proper divisors (18731599).

18112520177 is an equidigital number, since it uses as much as digits as its factorization.

18112520177 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18731598.

The product of its (nonzero) digits is 7840, while the sum is 35.

The spelling of 18112520177 in words is "eighteen billion, one hundred twelve million, five hundred twenty thousand, one hundred seventy-seven".