18438554758 has 16 divisors (see below), whose sum is σ = 29800209600. Its totient is φ = 8505858816.

The previous prime is 18438554749. The next prime is 18438554789. The reversal of 18438554758 is 85745583481.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123358 + ... + 228241.

It is an arithmetic number, because the mean of its divisors is an integer number (1862513100).

Almost surely, 2^18438554758 is an apocalyptic number.

18438554758 is a deficient number, since it is larger than the sum of its proper divisors (11361654842).

18438554758 is a wasteful number, since it uses less digits than its factorization.

18438554758 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353631.

The product of its digits is 21504000, while the sum is 58.

The spelling of 18438554758 in words is "eighteen billion, four hundred thirty-eight million, five hundred fifty-four thousand, seven hundred fifty-eight".