19982220 has 48 divisors (see below), whose sum is σ = 57468768. Its totient is φ = 5184000.

The previous prime is 19982213. The next prime is 19982251. The reversal of 19982220 is 2228991.

It is a happy number.

It is a super-2 number, since 2×19982220² = 798578232256800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2281 + ... + 6720.

It is an arithmetic number, because the mean of its divisors is an integer number (1197266).

Almost surely, 2^19982220 is an apocalyptic number.

19982220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19982220 is an abundant number, since it is smaller than the sum of its proper divisors (37486548).

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

19982220 is a wasteful number, since it uses less digits than its factorization.

19982220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9050 (or 9048 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 19982220 is about 4470.1476485682. The cubic root of 19982220 is about 271.3613005694.

It can be divided in two parts, 19982 and 220, that added together give a palindrome (20202).

The spelling of 19982220 in words is "nineteen million, nine hundred eighty-two thousand, two hundred twenty".