19904380 has 12 divisors (see below), whose sum is σ = 41799240. Its totient is φ = 7961744.

The previous prime is 19904377. The next prime is 19904413. The reversal of 19904380 is 8340991.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 497590 + ... + 497629.

It is an arithmetic number, because the mean of its divisors is an integer number (3483270).

Almost surely, 2^19904380 is an apocalyptic number.

19904380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19904380 is an abundant number, since it is smaller than the sum of its proper divisors (21894860).

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

19904380 is a wasteful number, since it uses less digits than its factorization.

19904380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 995228 (or 995226 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 19904380 is about 4461.4325053731. The cubic root of 19904380 is about 271.0084827344.

The spelling of 19904380 in words is "nineteen million, nine hundred four thousand, three hundred eighty".