18976240 has 20 divisors (see below), whose sum is σ = 44119944. Its totient is φ = 7590464.

The previous prime is 18976189. The next prime is 18976249. The reversal of 18976240 is 4267981.

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

It is a self number, because there is not a number n which added to its sum of digits gives 18976240.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18976249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118522 + ... + 118681.

Almost surely, 2^18976240 is an apocalyptic number.

18976240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18976240 is an abundant number, since it is smaller than the sum of its proper divisors (25143704).

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

18976240 is a wasteful number, since it uses less digits than its factorization.

18976240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237216 (or 237210 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 18976240 is about 4356.1726320246. The cubic root of 18976240 is about 266.7288882584.

The spelling of 18976240 in words is "eighteen million, nine hundred seventy-six thousand, two hundred forty".