18156785314 has 4 divisors (see below), whose sum is σ = 27235177974. Its totient is φ = 9078392656.

The previous prime is 18156785293. The next prime is 18156785329. The reversal of 18156785314 is 41358765181.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 17831596225 + 325189089 = 133535^2 + 18033^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4539196327 + ... + 4539196330.

Almost surely, 2^18156785314 is an apocalyptic number.

18156785314 is a deficient number, since it is larger than the sum of its proper divisors (9078392660).

18156785314 is an equidigital number, since it uses as much as digits as its factorization.

18156785314 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9078392659.

The product of its digits is 806400, while the sum is 49.

The spelling of 18156785314 in words is "eighteen billion, one hundred fifty-six million, seven hundred eighty-five thousand, three hundred fourteen".