20213824 has 28 divisors (see below), whose sum is σ = 40434768. Its totient is φ = 10025600.

The previous prime is 20213819. The next prime is 20213857. The reversal of 20213824 is 42831202.

It is a junction number, because it is equal to n+sod(n) for n = 20213795 and 20213804.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7179 + ... + 9589.

Almost surely, 2^20213824 is an apocalyptic number.

It is an amenable number.

20213824 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

20213824 is a wasteful number, since it uses less digits than its factorization.

20213824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2554 (or 2544 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 20213824 is about 4495.9786476361. The cubic root of 20213824 is about 272.4056806812.

The spelling of 20213824 in words is "twenty million, two hundred thirteen thousand, eight hundred twenty-four".