20868850 has 12 divisors (see below), whose sum is σ = 38816154. Its totient is φ = 8347520.

The previous prime is 20868847. The next prime is 20868853. The reversal of 20868850 is 5886802.

It is an interprime number because it is at equal distance from previous prime (20868847) and next prime (20868853).

It can be written as a sum of positive squares in 3 ways, for example, as 12694969 + 8173881 = 3563^2 + 2859^2 .

It is not an unprimeable number, because it can be changed into a prime (20868853) 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, 208639 + ... + 208738.

Almost surely, 2^20868850 is an apocalyptic number.

20868850 is a deficient number, since it is larger than the sum of its proper divisors (17947304).

20868850 is a wasteful number, since it uses less digits than its factorization.

20868850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417389 (or 417384 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 37.

The square root of 20868850 is about 4568.2436449909. The cubic root of 20868850 is about 275.3168799011.

The spelling of 20868850 in words is "twenty million, eight hundred sixty-eight thousand, eight hundred fifty".