20980450 has 12 divisors (see below), whose sum is σ = 39023730. Its totient is φ = 8392160.

The previous prime is 20980441. The next prime is 20980457. The reversal of 20980450 is 5408902.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 18636489 + 2343961 = 4317^2 + 1531^2 .

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (20980457) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 209755 + ... + 209854.

Almost surely, 2^20980450 is an apocalyptic number.

20980450 is a deficient number, since it is larger than the sum of its proper divisors (18043280).

20980450 is a wasteful number, since it uses less digits than its factorization.

20980450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419621 (or 419616 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 20980450 is about 4580.4421183986. The cubic root of 20980450 is about 275.8067768224.

The spelling of 20980450 in words is "twenty million, nine hundred eighty thousand, four hundred fifty".