20256265 has 16 divisors (see below), whose sum is σ = 25909632. Its totient is φ = 15149824.

The previous prime is 20256263. The next prime is 20256281. The reversal of 20256265 is 56265202.

It is a cyclic number.

It is not a de Polignac number, because 20256265 - 2¹ = 20256263 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20256263) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13482 + ... + 14908.

It is an arithmetic number, because the mean of its divisors is an integer number (1619352).

Almost surely, 2^20256265 is an apocalyptic number.

It is an amenable number.

20256265 is a deficient number, since it is larger than the sum of its proper divisors (5653367).

20256265 is a wasteful number, since it uses less digits than its factorization.

20256265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1616.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 20256265 is about 4500.6960572783. The cubic root of 20256265 is about 272.5961953117.

The spelling of 20256265 in words is "twenty million, two hundred fifty-six thousand, two hundred sixty-five".