18141806838 has 32 divisors (see below), whose sum is σ = 36764380800. Its totient is φ = 5967314496.

The previous prime is 18141806827. The next prime is 18141806849. The reversal of 18141806838 is 83860814181.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18141806827) and next prime (18141806849).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 406578 + ... + 448986.

It is an arithmetic number, because the mean of its divisors is an integer number (1148886900).

Almost surely, 2^18141806838 is an apocalyptic number.

18141806838 is an abundant number, since it is smaller than the sum of its proper divisors (18622573962).

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

18141806838 is a wasteful number, since it uses less digits than its factorization.

18141806838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43356.

The product of its (nonzero) digits is 294912, while the sum is 48.

The spelling of 18141806838 in words is "eighteen billion, one hundred forty-one million, eight hundred six thousand, eight hundred thirty-eight".