19924398 has 24 divisors (see below), whose sum is σ = 46490808. Its totient is φ = 6130512.

The previous prime is 19924397. The next prime is 19924433. The reversal of 19924398 is 89342991.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19924397) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42340 + ... + 42807.

It is an arithmetic number, because the mean of its divisors is an integer number (1937117).

Almost surely, 2^19924398 is an apocalyptic number.

19924398 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

19924398 is an abundant number, since it is smaller than the sum of its proper divisors (26566410).

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

19924398 is a wasteful number, since it uses less digits than its factorization.

19924398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85168 (or 85165 counting only the distinct ones).

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

The square root of 19924398 is about 4463.6753914235. The cubic root of 19924398 is about 271.0993041207.

The spelling of 19924398 in words is "nineteen million, nine hundred twenty-four thousand, three hundred ninety-eight".