19881150 has 24 divisors (see below), whose sum is σ = 49305624. Its totient is φ = 5301600.

The previous prime is 19881149. The next prime is 19881151. The reversal of 19881150 is 5118891.

It is an interprime number because it is at equal distance from previous prime (19881149) and next prime (19881151).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19881151) 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, 66121 + ... + 66420.

It is an arithmetic number, because the mean of its divisors is an integer number (2054401).

Almost surely, 2^19881150 is an apocalyptic number.

19881150 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19881150 is an abundant number, since it is smaller than the sum of its proper divisors (29424474).

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

19881150 is a wasteful number, since it uses less digits than its factorization.

19881150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132556 (or 132551 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 33.

The square root of 19881150 is about 4458.8283214315. The cubic root of 19881150 is about 270.9030121836.

The spelling of 19881150 in words is "nineteen million, eight hundred eighty-one thousand, one hundred fifty".