20880064 has 14 divisors (see below), whose sum is σ = 41434004. Its totient is φ = 10440000.

The previous prime is 20880043. The next prime is 20880071. The reversal of 20880064 is 46008802.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 163062 + ... + 163189.

Almost surely, 2^20880064 is an apocalyptic number.

It is an amenable number.

20880064 is a deficient number, since it is larger than the sum of its proper divisors (20553940).

20880064 is an equidigital number, since it uses as much as digits as its factorization.

20880064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326263 (or 326253 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 20880064 is about 4569.4708665227. The cubic root of 20880064 is about 275.3661854553.

Adding to 20880064 its reverse (46008802), we get a palindrome (66888866).

The spelling of 20880064 in words is "twenty million, eight hundred eighty thousand, sixty-four".