20015264 has 12 divisors (see below), whose sum is σ = 39405114. Its totient is φ = 10007616.

The previous prime is 20015251. The next prime is 20015293. The reversal of 20015264 is 46251002.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 19536400 + 478864 = 4420^2 + 692^2 .

It is a super-2 number, since 2×20015264² = 801221585979392, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312707 + ... + 312770.

Almost surely, 2^20015264 is an apocalyptic number.

It is an amenable number.

20015264 is a deficient number, since it is larger than the sum of its proper divisors (19389850).

20015264 is an equidigital number, since it uses as much as digits as its factorization.

20015264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 625487 (or 625479 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 20015264 is about 4473.8421965912. The cubic root of 20015264 is about 271.5107988836.

Adding to 20015264 its reverse (46251002), we get a palindrome (66266266).

The spelling of 20015264 in words is "twenty million, fifteen thousand, two hundred sixty-four".