19981150 has 24 divisors (see below), whose sum is σ = 42474960. Its totient is φ = 6850560.

The previous prime is 19981139. The next prime is 19981151. The reversal of 19981150 is 5118991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19981151) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 28195 + ... + 28894.

It is an arithmetic number, because the mean of its divisors is an integer number (1769790).

Almost surely, 2^19981150 is an apocalyptic number.

19981150 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19981150 is an abundant number, since it is smaller than the sum of its proper divisors (22493810).

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

19981150 is a wasteful number, since it uses less digits than its factorization.

19981150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57108 (or 57103 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 34.

The square root of 19981150 is about 4470.0279641183. The cubic root of 19981150 is about 271.3564569005.

The spelling of 19981150 in words is "nineteen million, nine hundred eighty-one thousand, one hundred fifty".