18538361382 has 16 divisors (see below), whose sum is σ = 39257706672. Its totient is φ = 5815956480.

The previous prime is 18538361381. The next prime is 18538361407. The reversal of 18538361382 is 28316383581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18538361381) 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, 90874219 + ... + 90874422.

It is an arithmetic number, because the mean of its divisors is an integer number (2453606667).

Almost surely, 2^18538361382 is an apocalyptic number.

18538361382 is an abundant number, since it is smaller than the sum of its proper divisors (20719345290).

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

18538361382 is a wasteful number, since it uses less digits than its factorization.

18538361382 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181748663.

The product of its digits is 829440, while the sum is 48.

The spelling of 18538361382 in words is "eighteen billion, five hundred thirty-eight million, three hundred sixty-one thousand, three hundred eighty-two".