20975450 has 24 divisors (see below), whose sum is σ = 41310972. Its totient is φ = 7896320.

The previous prime is 20975441. The next prime is 20975453. The reversal of 20975450 is 5457902.

It can be written as a sum of positive squares in 6 ways, for example, as 14569489 + 6405961 = 3817^2 + 2531^2 .

It is a zygodrome in base 4.

It is not an unprimeable number, because it can be changed into a prime (20975453) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11489 + ... + 13188.

Almost surely, 2^20975450 is an apocalyptic number.

20975450 is a deficient number, since it is larger than the sum of its proper divisors (20335522).

20975450 is a wasteful number, since it uses less digits than its factorization.

20975450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24706 (or 24701 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 20975450 is about 4579.8962870353. The cubic root of 20975450 is about 275.7848652579.

The spelling of 20975450 in words is "twenty million, nine hundred seventy-five thousand, four hundred fifty".