19831040 has 36 divisors (see below), whose sum is σ = 47504604. Its totient is φ = 7931904.

The previous prime is 19830973. The next prime is 19831067. The reversal of 19831040 is 4013891.

It can be written as a sum of positive squares in 2 ways, for example, as 3444736 + 16386304 = 1856^2 + 4048^2 .

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, 6467 + ... + 9026.

Almost surely, 2^19831040 is an apocalyptic number.

19831040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19831040 is an abundant number, since it is smaller than the sum of its proper divisors (27673564).

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

19831040 is an equidigital number, since it uses as much as digits as its factorization.

19831040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15514 (or 15500 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 19831040 is about 4453.2055869901. The cubic root of 19831040 is about 270.6752190050.

The spelling of 19831040 in words is "nineteen million, eight hundred thirty-one thousand, forty".