19955250 has 144 divisors (see below), whose sum is σ = 63115416. Its totient is φ = 4536000.

The previous prime is 19955249. The next prime is 19955261. The reversal of 19955250 is 5255991.

It can be written as a sum of positive squares in 4 ways, for example, as 1058841 + 18896409 = 1029^2 + 4347^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 110160 + ... + 110340.

Almost surely, 2^19955250 is an apocalyptic number.

19955250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 19955250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31557708).

19955250 is an abundant number, since it is smaller than the sum of its proper divisors (43160166).

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

19955250 is a wasteful number, since it uses less digits than its factorization.

19955250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218 (or 198 counting only the distinct ones).

The product of its (nonzero) digits is 20250, while the sum is 36.

The square root of 19955250 is about 4467.1299510984. The cubic root of 19955250 is about 271.2391601634.

The spelling of 19955250 in words is "nineteen million, nine hundred fifty-five thousand, two hundred fifty".