20265291 has 12 divisors (see below), whose sum is σ = 29427840. Its totient is φ = 13438320.

The previous prime is 20265269. The next prime is 20265299. The reversal of 20265291 is 19256202.

20265291 is a `hidden beast` number, since 2 + 0 + 2 + 652 + 9 + 1 = 666.

It is not a de Polignac number, because 20265291 - 2¹³ = 20257099 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20265299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4176 + ... + 7613.

It is an arithmetic number, because the mean of its divisors is an integer number (2452320).

Almost surely, 2^20265291 is an apocalyptic number.

20265291 is a deficient number, since it is larger than the sum of its proper divisors (9162549).

20265291 is a wasteful number, since it uses less digits than its factorization.

20265291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11986 (or 11983 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 20265291 is about 4501.6986793876. The cubic root of 20265291 is about 272.6366780611.

The spelling of 20265291 in words is "twenty million, two hundred sixty-five thousand, two hundred ninety-one".