19187982 has 32 divisors (see below), whose sum is σ = 46517760. Its totient is φ = 5814360.

The previous prime is 19187981. The next prime is 19187999. The reversal of 19187982 is 28978191.

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19187981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15558 + ... + 16745.

It is an arithmetic number, because the mean of its divisors is an integer number (1453680).

Almost surely, 2^19187982 is an apocalyptic number.

19187982 is an abundant number, since it is smaller than the sum of its proper divisors (27329778).

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

19187982 is a wasteful number, since it uses less digits than its factorization.

19187982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32325 (or 32319 counting only the distinct ones).

The product of its digits is 72576, while the sum is 45.

The square root of 19187982 is about 4380.4088850243. The cubic root of 19187982 is about 267.7172986135.

The spelling of 19187982 in words is "nineteen million, one hundred eighty-seven thousand, nine hundred eighty-two".