20464265 has 8 divisors (see below), whose sum is σ = 24581448. Its totient is φ = 16355200.

The previous prime is 20464237. The next prime is 20464267. The reversal of 20464265 is 56246402.

It can be written as a sum of positive squares in 4 ways, for example, as 652864 + 19811401 = 808^2 + 4451^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20464265 - 2⁸ = 20464009 is a prime.

It is a super-2 number, since 2×20464265² = 837572283980450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20464267) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8429 + ... + 10581.

It is an arithmetic number, because the mean of its divisors is an integer number (3072681).

Almost surely, 2^20464265 is an apocalyptic number.

It is an amenable number.

20464265 is a deficient number, since it is larger than the sum of its proper divisors (4117183).

20464265 is a wasteful number, since it uses less digits than its factorization.

20464265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4059.

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 20464265 is about 4523.7445772280. The cubic root of 20464265 is about 273.5260645795.

The spelling of 20464265 in words is "twenty million, four hundred sixty-four thousand, two hundred sixty-five".