20264505 has 16 divisors (see below), whose sum is σ = 32956224. Its totient is φ = 10630080.

The previous prime is 20264479. The next prime is 20264509. The reversal of 20264505 is 50546202.

It is not a de Polignac number, because 20264505 - 2⁸ = 20264249 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20264509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10159 + ... + 11988.

It is an arithmetic number, because the mean of its divisors is an integer number (2059764).

Almost surely, 2^20264505 is an apocalyptic number.

It is an amenable number.

20264505 is a deficient number, since it is larger than the sum of its proper divisors (12691719).

20264505 is a wasteful number, since it uses less digits than its factorization.

20264505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22216.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 20264505 is about 4501.6113781623. The cubic root of 20264505 is about 272.6331532297.

The spelling of 20264505 in words is "twenty million, two hundred sixty-four thousand, five hundred five".