20924982 has 48 divisors (see below), whose sum is σ = 49166208. Its totient is φ = 6393600.

The previous prime is 20924957. The next prime is 20924987. The reversal of 20924982 is 28942902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20924987) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 51982 + ... + 52382.

It is an arithmetic number, because the mean of its divisors is an integer number (1024296).

Almost surely, 2^20924982 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20924982, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24583104).

20924982 is an abundant number, since it is smaller than the sum of its proper divisors (28241226).

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

20924982 is a wasteful number, since it uses less digits than its factorization.

20924982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645 (or 642 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 20924982 is about 4574.3832371151. The cubic root of 20924982 is about 275.5635034875.

The spelling of 20924982 in words is "twenty million, nine hundred twenty-four thousand, nine hundred eighty-two".