18841040 has 20 divisors (see below), whose sum is σ = 43805604. Its totient is φ = 7536384.

The previous prime is 18841021. The next prime is 18841061. The reversal of 18841040 is 4014881.

It can be written as a sum of positive squares in 2 ways, for example, as 10291264 + 8549776 = 3208^2 + 2924^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117677 + ... + 117836.

Almost surely, 2^18841040 is an apocalyptic number.

18841040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18841040 is an abundant number, since it is smaller than the sum of its proper divisors (24964564).

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

18841040 is a wasteful number, since it uses less digits than its factorization.

18841040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235526 (or 235520 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 26.

The square root of 18841040 is about 4340.6266828650. The cubic root of 18841040 is about 266.0939235283.

The spelling of 18841040 in words is "eighteen million, eight hundred forty-one thousand, forty".