18212152178 has 8 divisors (see below), whose sum is σ = 29801703600. Its totient is φ = 8278250980.

The previous prime is 18212152159. The next prime is 18212152199. The reversal of 18212152178 is 87125121281.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 413912528 + ... + 413912571.

It is an arithmetic number, because the mean of its divisors is an integer number (3725212950).

Almost surely, 2^18212152178 is an apocalyptic number.

18212152178 is a deficient number, since it is larger than the sum of its proper divisors (11589551422).

18212152178 is a wasteful number, since it uses less digits than its factorization.

18212152178 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 827825112.

The product of its digits is 17920, while the sum is 38.

The spelling of 18212152178 in words is "eighteen billion, two hundred twelve million, one hundred fifty-two thousand, one hundred seventy-eight".