18741138 has 16 divisors (see below), whose sum is σ = 40365696. Its totient is φ = 5766480.

The previous prime is 18741127. The next prime is 18741139. The reversal of 18741138 is 83114781.

It is a junction number, because it is equal to n+sod(n) for n = 18741099 and 18741108.

It is not an unprimeable number, because it can be changed into a prime (18741139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120058 + ... + 120213.

It is an arithmetic number, because the mean of its divisors is an integer number (2522856).

Almost surely, 2^18741138 is an apocalyptic number.

18741138 is an abundant number, since it is smaller than the sum of its proper divisors (21624558).

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

18741138 is a wasteful number, since it uses less digits than its factorization.

18741138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240289.

The product of its digits is 5376, while the sum is 33.

The square root of 18741138 is about 4329.1036023639. The cubic root of 18741138 is about 265.6227811210.

The spelling of 18741138 in words is "eighteen million, seven hundred forty-one thousand, one hundred thirty-eight".