20982442 has 8 divisors (see below), whose sum is σ = 33894756. Its totient is φ = 9684192.

The previous prime is 20982433. The next prime is 20982449. The reversal of 20982442 is 24428902.

It can be written as a sum of positive squares in 2 ways, for example, as 17986081 + 2996361 = 4241^2 + 1731^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a zygodrome in base 4.

It is not an unprimeable number, because it can be changed into a prime (20982449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 403483 + ... + 403534.

Almost surely, 2^20982442 is an apocalyptic number.

20982442 is a deficient number, since it is larger than the sum of its proper divisors (12912314).

20982442 is a wasteful number, since it uses less digits than its factorization.

20982442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 807032.

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 20982442 is about 4580.6595594958. The cubic root of 20982442 is about 275.8155054199.

The spelling of 20982442 in words is "twenty million, nine hundred eighty-two thousand, four hundred forty-two".