18500542379 has 4 divisors (see below), whose sum is σ = 20182409880. Its totient is φ = 16818674880.

The previous prime is 18500542331. The next prime is 18500542393. The reversal of 18500542379 is 97324500581.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18500542379 - 2¹² = 18500538283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18500541379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 840933734 + ... + 840933755.

It is an arithmetic number, because the mean of its divisors is an integer number (5045602470).

Almost surely, 2^18500542379 is an apocalyptic number.

18500542379 is a deficient number, since it is larger than the sum of its proper divisors (1681867501).

18500542379 is a wasteful number, since it uses less digits than its factorization.

18500542379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1681867500.

The product of its (nonzero) digits is 302400, while the sum is 44.

The spelling of 18500542379 in words is "eighteen billion, five hundred million, five hundred forty-two thousand, three hundred seventy-nine".