18647143674 has 16 divisors (see below), whose sum is σ = 37295834400. Its totient is φ = 6215456720.

The previous prime is 18647143631. The next prime is 18647143679. The reversal of 18647143674 is 47634174681.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (18647143679) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144184 + ... + 241004.

It is an arithmetic number, because the mean of its divisors is an integer number (2330989650).

Almost surely, 2^18647143674 is an apocalyptic number.

18647143674 is an abundant number, since it is smaller than the sum of its proper divisors (18648690726).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18647143674 is a wasteful number, since it uses less digits than its factorization.

18647143674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128925.

The product of its digits is 2709504, while the sum is 51.

The spelling of 18647143674 in words is "eighteen billion, six hundred forty-seven million, one hundred forty-three thousand, six hundred seventy-four".