18241427438 has 16 divisors (see below), whose sum is σ = 29483578320. Its totient is φ = 8414361216.

The previous prime is 18241427401. The next prime is 18241427453. The reversal of 18241427438 is 83472414281.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151208 + ... + 243611.

It is an arithmetic number, because the mean of its divisors is an integer number (1842723645).

Almost surely, 2^18241427438 is an apocalyptic number.

18241427438 is a deficient number, since it is larger than the sum of its proper divisors (11242150882).

18241427438 is a wasteful number, since it uses less digits than its factorization.

18241427438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396611.

The product of its digits is 344064, while the sum is 44.

The spelling of 18241427438 in words is "eighteen billion, two hundred forty-one million, four hundred twenty-seven thousand, four hundred thirty-eight".