18426815738 has 16 divisors (see below), whose sum is σ = 27813227904. Its totient is φ = 9155769840.

The previous prime is 18426815711. The next prime is 18426815753. The reversal of 18426815738 is 83751862481.

It is a self number, because there is not a number n which added to its sum of digits gives 18426815738.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2376548 + ... + 2384288.

It is an arithmetic number, because the mean of its divisors is an integer number (1738326744).

Almost surely, 2^18426815738 is an apocalyptic number.

18426815738 is a deficient number, since it is larger than the sum of its proper divisors (9386412166).

18426815738 is a wasteful number, since it uses less digits than its factorization.

18426815738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15037.

The product of its digits is 2580480, while the sum is 53.

The spelling of 18426815738 in words is "eighteen billion, four hundred twenty-six million, eight hundred fifteen thousand, seven hundred thirty-eight".