20503264 has 12 divisors (see below), whose sum is σ = 40365864. Its totient is φ = 10251616.

The previous prime is 20503253. The next prime is 20503271. The reversal of 20503264 is 46230502.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320332 + ... + 320395.

It is an arithmetic number, because the mean of its divisors is an integer number (3363822).

Almost surely, 2^20503264 is an apocalyptic number.

It is an amenable number.

20503264 is a deficient number, since it is larger than the sum of its proper divisors (19862600).

20503264 is an equidigital number, since it uses as much as digits as its factorization.

20503264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640737 (or 640729 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 20503264 is about 4528.0530032234. The cubic root of 20503264 is about 273.6997083096.

Adding to 20503264 its reverse (46230502), we get a palindrome (66733766).

The spelling of 20503264 in words is "twenty million, five hundred three thousand, two hundred sixty-four".