20032864 has 24 divisors (see below), whose sum is σ = 39559968. Its totient is φ = 9985920.

The previous prime is 20032847. The next prime is 20032867. The reversal of 20032864 is 46823002.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20032867) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 12729 + ... + 14215.

It is an arithmetic number, because the mean of its divisors is an integer number (1648332).

Almost surely, 2^20032864 is an apocalyptic number.

It is an amenable number.

20032864 is a deficient number, since it is larger than the sum of its proper divisors (19527104).

20032864 is a wasteful number, since it uses less digits than its factorization.

20032864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1918 (or 1910 counting only the distinct ones).

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

The square root of 20032864 is about 4475.8087537338. The cubic root of 20032864 is about 271.5903579989.

Adding to 20032864 its reverse (46823002), we get a palindrome (66855866).

The spelling of 20032864 in words is "twenty million, thirty-two thousand, eight hundred sixty-four".