20863242 has 24 divisors (see below), whose sum is σ = 45288516. Its totient is φ = 6941376.

The previous prime is 20863229. The next prime is 20863247. The reversal of 20863242 is 24236802.

20863242 is a `hidden beast` number, since 20 + 8 + 632 + 4 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 20439441 + 423801 = 4521^2 + 651^2 .

It is not an unprimeable number, because it can be changed into a prime (20863247) 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, 16248 + ... + 17484.

Almost surely, 2^20863242 is an apocalyptic number.

20863242 is an abundant number, since it is smaller than the sum of its proper divisors (24425274).

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

20863242 is a wasteful number, since it uses less digits than its factorization.

20863242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2182 (or 2179 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 20863242 is about 4567.6298011113. The cubic root of 20863242 is about 275.2922161018.

The spelling of 20863242 in words is "twenty million, eight hundred sixty-three thousand, two hundred forty-two".