18656021074 has 8 divisors (see below), whose sum is σ = 29456875440. Its totient is φ = 8837062596.

The previous prime is 18656021063. The next prime is 18656021077. The reversal of 18656021074 is 47012065681.

18656021074 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-2 number, since 2×18656021074² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18656021077) 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, 245473924 + ... + 245473999.

It is an arithmetic number, because the mean of its divisors is an integer number (3682109430).

Almost surely, 2^18656021074 is an apocalyptic number.

18656021074 is a deficient number, since it is larger than the sum of its proper divisors (10800854366).

18656021074 is a wasteful number, since it uses less digits than its factorization.

18656021074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490947944.

The product of its (nonzero) digits is 80640, while the sum is 40.

The spelling of 18656021074 in words is "eighteen billion, six hundred fifty-six million, twenty-one thousand, seventy-four".