19938282 has 72 divisors (see below), whose sum is σ = 50297184. Its totient is φ = 5159232.

The previous prime is 19938241. The next prime is 19938287. The reversal of 19938282 is 28283991.

It is a super-2 number, since 2×19938282² = 795070178223048, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

Its product of digits (62208) is a multiple of the sum of its prime factors (144).

It is not an unprimeable number, because it can be changed into a prime (19938287) 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 35 ways as a sum of consecutive naturals, for example, 376168 + ... + 376220.

It is an arithmetic number, because the mean of its divisors is an integer number (698572).

Almost surely, 2^19938282 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19938282, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25148592).

19938282 is an abundant number, since it is smaller than the sum of its proper divisors (30358902).

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

19938282 is a wasteful number, since it uses less digits than its factorization.

19938282 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144 (or 78 counting only the distinct ones).

The product of its digits is 62208, while the sum is 42.

The square root of 19938282 is about 4465.2303412030. The cubic root of 19938282 is about 271.1622599131.

Multiplying 19938282 by its sum of digits (42), we get a square (837407844 = 28938²).

19938282 divided by its sum of digits (42) gives a square (474721 = 689²).

The spelling of 19938282 in words is "nineteen million, nine hundred thirty-eight thousand, two hundred eighty-two".