20982220 has 24 divisors (see below), whose sum is σ = 50357664. Its totient is φ = 7193856.

The previous prime is 20982211. The next prime is 20982239. The reversal of 20982220 is 2228902.

It is a super-2 number, since 2×20982220² = 880507112256800, which contains 22 as substring.

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, 74797 + ... + 75076.

It is an arithmetic number, because the mean of its divisors is an integer number (2098236).

Almost surely, 2^20982220 is an apocalyptic number.

20982220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20982220 is an abundant number, since it is smaller than the sum of its proper divisors (29375444).

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

20982220 is a wasteful number, since it uses less digits than its factorization.

20982220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149889 (or 149887 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 20982220 is about 4580.6353271135. The cubic root of 20982220 is about 275.8145326819.

The spelling of 20982220 in words is "twenty million, nine hundred eighty-two thousand, two hundred twenty".