19982420 has 24 divisors (see below), whose sum is σ = 42190848. Its totient is φ = 7949600.

The previous prime is 19982407. The next prime is 19982437. The reversal of 19982420 is 2428991.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1205 + ... + 6435.

It is an arithmetic number, because the mean of its divisors is an integer number (1757952).

Almost surely, 2^19982420 is an apocalyptic number.

19982420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19982420 is an abundant number, since it is smaller than the sum of its proper divisors (22208428).

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

19982420 is a wasteful number, since it uses less digits than its factorization.

19982420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5431 (or 5429 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 19982420 is about 4470.1700191380. The cubic root of 19982420 is about 271.3622059089.

It can be divided in two parts, 19982 and 420, that added together give a palindrome (20402).

The spelling of 19982420 in words is "nineteen million, nine hundred eighty-two thousand, four hundred twenty".