18038805343 has 32 divisors (see below), whose sum is σ = 20490624000. Its totient is φ = 15769385856.

The previous prime is 18038805341. The next prime is 18038805353. The reversal of 18038805343 is 34350883081.

It is not a de Polignac number, because 18038805343 - 2¹ = 18038805341 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18038805343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18038805341) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2860608 + ... + 2866906.

It is an arithmetic number, because the mean of its divisors is an integer number (640332000).

Almost surely, 2^18038805343 is an apocalyptic number.

18038805343 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

18038805343 is a deficient number, since it is larger than the sum of its proper divisors (2451818657).

18038805343 is a wasteful number, since it uses less digits than its factorization.

18038805343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6511.

The product of its (nonzero) digits is 276480, while the sum is 43.

The spelling of 18038805343 in words is "eighteen billion, thirty-eight million, eight hundred five thousand, three hundred forty-three".