19900232 has 32 divisors (see below), whose sum is σ = 41126400. Its totient is φ = 8952000.

The previous prime is 19900193. The next prime is 19900253. The reversal of 19900232 is 23200991.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7769 + ... + 10007.

It is an arithmetic number, because the mean of its divisors is an integer number (1285200).

Almost surely, 2^19900232 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19900232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20563200).

19900232 is an abundant number, since it is smaller than the sum of its proper divisors (21226168).

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

19900232 is a wasteful number, since it uses less digits than its factorization.

19900232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2357 (or 2353 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 19900232 is about 4460.9676080420. The cubic root of 19900232 is about 270.9896557010.

The spelling of 19900232 in words is "nineteen million, nine hundred thousand, two hundred thirty-two".