20464263 has 6 divisors (see below), whose sum is σ = 29559504. Its totient is φ = 13642836.

The previous prime is 20464237. The next prime is 20464267. The reversal of 20464263 is 36246402.

It is not a de Polignac number, because 20464263 - 2¹⁰ = 20463239 is a prime.

It is a congruent 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 5 ways as a sum of consecutive naturals, for example, 1136895 + ... + 1136912.

It is an arithmetic number, because the mean of its divisors is an integer number (4926584).

Almost surely, 2^20464263 is an apocalyptic number.

20464263 is a deficient number, since it is larger than the sum of its proper divisors (9095241).

20464263 is a wasteful number, since it uses less digits than its factorization.

20464263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2273813 (or 2273810 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

The square root of 20464263 is about 4523.7443561722. The cubic root of 20464263 is about 273.5260556688.

The spelling of 20464263 in words is "twenty million, four hundred sixty-four thousand, two hundred sixty-three".