18338140734 has 16 divisors (see below), whose sum is σ = 36677775888. Its totient is φ = 6112464512.

The previous prime is 18338140697. The next prime is 18338140759. The reversal of 18338140734 is 43704183381.

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, 156244 + ... + 247160.

It is an arithmetic number, because the mean of its divisors is an integer number (2292360993).

Almost surely, 2^18338140734 is an apocalyptic number.

18338140734 is an abundant number, since it is smaller than the sum of its proper divisors (18339635154).

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

18338140734 is a wasteful number, since it uses less digits than its factorization.

18338140734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124539.

The product of its (nonzero) digits is 193536, while the sum is 42.

It can be divided in two parts, 183381 and 40734, that added together give a triangular number (224115 = T₆₆₉).

The spelling of 18338140734 in words is "eighteen billion, three hundred thirty-eight million, one hundred forty thousand, seven hundred thirty-four".