19882420 has 24 divisors (see below), whose sum is σ = 42543144. Its totient is φ = 7802496.

The previous prime is 19882403. The next prime is 19882427. The reversal of 19882420 is 2428891.

It can be written as a sum of positive squares in 4 ways, for example, as 4343056 + 15539364 = 2084^2 + 3942^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19882427) 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 7 ways as a sum of consecutive naturals, for example, 8319 + ... + 10438.

It is an arithmetic number, because the mean of its divisors is an integer number (1772631).

Almost surely, 2^19882420 is an apocalyptic number.

19882420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19882420 is an abundant number, since it is smaller than the sum of its proper divisors (22660724).

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

19882420 is a wasteful number, since it uses less digits than its factorization.

19882420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18819 (or 18817 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 19882420 is about 4458.9707332522. The cubic root of 19882420 is about 270.9087804532.

It can be divided in two parts, 19882 and 420, that added together give a palindrome (20302).

The spelling of 19882420 in words is "nineteen million, eight hundred eighty-two thousand, four hundred twenty".