20982480 has 40 divisors (see below), whose sum is σ = 65046432. Its totient is φ = 5595264.

The previous prime is 20982461. The next prime is 20982497. The reversal of 20982480 is 8428902.

It is a tau number, because it is divible by the number of its divisors (40).

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, 43474 + ... + 43953.

Almost surely, 2^20982480 is an apocalyptic number.

20982480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20982480 is an abundant number, since it is smaller than the sum of its proper divisors (44063952).

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

20982480 is a wasteful number, since it uses less digits than its factorization.

20982480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87443 (or 87437 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 20982480 is about 4580.6637073682. The cubic root of 20982480 is about 275.8156719240.

The spelling of 20982480 in words is "twenty million, nine hundred eighty-two thousand, four hundred eighty".