20261264 has 20 divisors (see below), whose sum is σ = 39998556. Its totient is φ = 9939072.

The previous prime is 20261261. The next prime is 20261273. The reversal of 20261264 is 46216202.

It can be written as a sum of positive squares in 2 ways, for example, as 16875664 + 3385600 = 4108^2 + 1840^2 .

It is not an unprimeable number, because it can be changed into a prime (20261261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11099 + ... + 12794.

Almost surely, 2^20261264 is an apocalyptic number.

It is an amenable number.

20261264 is a deficient number, since it is larger than the sum of its proper divisors (19737292).

20261264 is a wasteful number, since it uses less digits than its factorization.

20261264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23954 (or 23948 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 20261264 is about 4501.2513815605. The cubic root of 20261264 is about 272.6186179432.

Adding to 20261264 its reverse (46216202), we get a palindrome (66477466).

The spelling of 20261264 in words is "twenty million, two hundred sixty-one thousand, two hundred sixty-four".