18178700057 has 4 divisors (see below), whose sum is σ = 20775657216. Its totient is φ = 15581742900.

The previous prime is 18178700047. The next prime is 18178700087. The reversal of 18178700057 is 75000787181.

It is a happy number.

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 18178700057 - 2¹⁶ = 18178634521 is a prime.

It is a super-3 number, since 3×18178700057³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18178699990 and 18178700017.

It is not an unprimeable number, because it can be changed into a prime (18178700047) by changing a digit.

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, 1298478569 + ... + 1298478582.

It is an arithmetic number, because the mean of its divisors is an integer number (5193914304).

Almost surely, 2^18178700057 is an apocalyptic number.

It is an amenable number.

18178700057 is a deficient number, since it is larger than the sum of its proper divisors (2596957159).

18178700057 is an equidigital number, since it uses as much as digits as its factorization.

18178700057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2596957158.

The product of its (nonzero) digits is 109760, while the sum is 44.

The spelling of 18178700057 in words is "eighteen billion, one hundred seventy-eight million, seven hundred thousand, fifty-seven".