18181137074 has 8 divisors (see below), whose sum is σ = 27273097008. Its totient is φ = 9090104740.

The previous prime is 18181137053. The next prime is 18181137077. The reversal of 18181137074 is 47073118181.

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

It is not an unprimeable number, because it can be changed into a prime (18181137077) 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, 180632 + ... + 262659.

It is an arithmetic number, because the mean of its divisors is an integer number (3409137126).

Almost surely, 2^18181137074 is an apocalyptic number.

18181137074 is a deficient number, since it is larger than the sum of its proper divisors (9091959934).

18181137074 is a wasteful number, since it uses less digits than its factorization.

18181137074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463800.

The product of its (nonzero) digits is 37632, while the sum is 41.

The spelling of 18181137074 in words is "eighteen billion, one hundred eighty-one million, one hundred thirty-seven thousand, seventy-four".