19899324 has 48 divisors (see below), whose sum is σ = 53840640. Its totient is φ = 6343920.

The previous prime is 19899263. The next prime is 19899329. The reversal of 19899324 is 42399891.

It is a self number, because there is not a number n which added to its sum of digits gives 19899324.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19899329) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1522 + ... + 6489.

It is an arithmetic number, because the mean of its divisors is an integer number (1121680).

Almost surely, 2^19899324 is an apocalyptic number.

It is an amenable number.

19899324 is an abundant number, since it is smaller than the sum of its proper divisors (33941316).

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

19899324 is a wasteful number, since it uses less digits than its factorization.

19899324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8047 (or 8039 counting only the distinct ones).

The product of its digits is 139968, while the sum is 45.

The square root of 19899324 is about 4460.8658352387. The cubic root of 19899324 is about 270.9855341016.

The spelling of 19899324 in words is "nineteen million, eight hundred ninety-nine thousand, three hundred twenty-four".