18836940 has 24 divisors (see below), whose sum is σ = 52743600. Its totient is φ = 5023168.

The previous prime is 18836929. The next prime is 18836941. The reversal of 18836940 is 4963881.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (18836941) 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, 156915 + ... + 157034.

It is an arithmetic number, because the mean of its divisors is an integer number (2197650).

Almost surely, 2^18836940 is an apocalyptic number.

18836940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18836940 is an abundant number, since it is smaller than the sum of its proper divisors (33906660).

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

18836940 is a wasteful number, since it uses less digits than its factorization.

18836940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313961 (or 313959 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 18836940 is about 4340.1543751346. The cubic root of 18836940 is about 266.0746205558.

It can be divided in two parts, 188 and 36940, that added together give a triangular number (37128 = T₂₇₂).

The spelling of 18836940 in words is "eighteen million, eight hundred thirty-six thousand, nine hundred forty".