38642238018 has 24 divisors (see below), whose sum is σ = 83762263728. Its totient is φ = 12874989912.

The previous prime is 38642238013. The next prime is 38642238029. The reversal of 38642238018 is 81083224683.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (38642238013) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 438180 + ... + 518927.

It is an arithmetic number, because the mean of its divisors is an integer number (3490094322).

Almost surely, 2^38642238018 is an apocalyptic number.

38642238018 is an abundant number, since it is smaller than the sum of its proper divisors (45120025710).

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

38642238018 is a wasteful number, since it uses less digits than its factorization.

38642238018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 959358 (or 959355 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 45.

The spelling of 38642238018 in words is "thirty-eight billion, six hundred forty-two million, two hundred thirty-eight thousand, eighteen".