20863328 has 24 divisors (see below), whose sum is σ = 41225688. Its totient is φ = 10393344.

The previous prime is 20863321. The next prime is 20863351. The reversal of 20863328 is 82336802.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 20863294 and 20863303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20863321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8975 + ... + 11057.

It is an arithmetic number, because the mean of its divisors is an integer number (1717737).

Almost surely, 2^20863328 is an apocalyptic number.

It is an amenable number.

20863328 is a deficient number, since it is larger than the sum of its proper divisors (20362360).

20863328 is a wasteful number, since it uses less digits than its factorization.

20863328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2406 (or 2398 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 20863328 is about 4567.6392151745. The cubic root of 20863328 is about 275.2925943603.

It can be divided in two parts, 208 and 63328, that added together give a palindrome (63536).

The spelling of 20863328 in words is "twenty million, eight hundred sixty-three thousand, three hundred twenty-eight".