20265535 has 4 divisors (see below), whose sum is σ = 24318648. Its totient is φ = 16212424.

The previous prime is 20265523. The next prime is 20265551. The reversal of 20265535 is 53556202.

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

It is a cyclic number.

It is not a de Polignac number, because 20265535 - 2⁵ = 20265503 is a prime.

It is a Duffinian 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, 2026549 + ... + 2026558.

It is an arithmetic number, because the mean of its divisors is an integer number (6079662).

Almost surely, 2^20265535 is an apocalyptic number.

20265535 is a deficient number, since it is larger than the sum of its proper divisors (4053113).

20265535 is an equidigital number, since it uses as much as digits as its factorization.

20265535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4053112.

The product of its (nonzero) digits is 9000, while the sum is 28.

The square root of 20265535 is about 4501.7257801870. The cubic root of 20265535 is about 272.6377722650.

The spelling of 20265535 in words is "twenty million, two hundred sixty-five thousand, five hundred thirty-five".