20849265 has 16 divisors (see below), whose sum is σ = 37065600. Its totient is φ = 11119536.

The previous prime is 20849263. The next prime is 20849273. The reversal of 20849265 is 56294802.

It is a happy number.

It is not a de Polignac number, because 20849265 - 2¹ = 20849263 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20849263) 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, 77085 + ... + 77354.

It is an arithmetic number, because the mean of its divisors is an integer number (2316600).

Almost surely, 2^20849265 is an apocalyptic number.

It is an amenable number.

20849265 is a deficient number, since it is larger than the sum of its proper divisors (16216335).

20849265 is a wasteful number, since it uses less digits than its factorization.

20849265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154453 (or 154447 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 20849265 is about 4566.0995389939. The cubic root of 20849265 is about 275.2307264753.

The spelling of 20849265 in words is "twenty million, eight hundred forty-nine thousand, two hundred sixty-five".