18840467738 has 8 divisors (see below), whose sum is σ = 28321218432. Its totient is φ = 9400061596.

The previous prime is 18840467669. The next prime is 18840467743. The reversal of 18840467738 is 83776404881.

It is a happy number.

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, 10084970 + ... + 10086837.

It is an arithmetic number, because the mean of its divisors is an integer number (3540152304).

Almost surely, 2^18840467738 is an apocalyptic number.

18840467738 is a deficient number, since it is larger than the sum of its proper divisors (9480750694).

18840467738 is a wasteful number, since it uses less digits than its factorization.

18840467738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20172276.

The product of its (nonzero) digits is 7225344, while the sum is 56.

The spelling of 18840467738 in words is "eighteen billion, eight hundred forty million, four hundred sixty-seven thousand, seven hundred thirty-eight".