20265005 has 4 divisors (see below), whose sum is σ = 24318012. Its totient is φ = 16212000.

The previous prime is 20264989. The next prime is 20265013. The reversal of 20265005 is 50056202.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5373124 + 14891881 = 2318^2 + 3859^2 .

It is not a de Polignac number, because 20265005 - 2⁴ = 20264989 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2026496 + ... + 2026505.

It is an arithmetic number, because the mean of its divisors is an integer number (6079503).

Almost surely, 2^20265005 is an apocalyptic number.

It is an amenable number.

20265005 is a deficient number, since it is larger than the sum of its proper divisors (4053007).

20265005 is an equidigital number, since it uses as much as digits as its factorization.

20265005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4053006.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 20265005 is about 4501.6669134888. Note that the first 3 decimals coincide. The cubic root of 20265005 is about 272.6353954994.

The spelling of 20265005 in words is "twenty million, two hundred sixty-five thousand, five".