20863024 has 120 divisors (see below), whose sum is σ = 53434080. Its totient is φ = 7805952.

The previous prime is 20862997. The next prime is 20863039. The reversal of 20863024 is 42036802.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20863024.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 234372 + ... + 234460.

It is an arithmetic number, because the mean of its divisors is an integer number (445284).

Almost surely, 2^20863024 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20863024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26717040).

20863024 is an abundant number, since it is smaller than the sum of its proper divisors (32571056).

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

20863024 is a wasteful number, since it uses less digits than its factorization.

20863024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147 (or 134 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 20863024 is about 4567.6059374688. The cubic root of 20863024 is about 275.2912572557.

Adding to 20863024 its reverse (42036802), we get a palindrome (62899826).

Subtracting 20863024 from its reverse (42036802), we obtain a triangular number (21173778 = T₆₅₀₇).

The spelling of 20863024 in words is "twenty million, eight hundred sixty-three thousand, twenty-four".