20875245 has 16 divisors (see below), whose sum is σ = 34478592. Its totient is φ = 10774080.

The previous prime is 20875241. The next prime is 20875249. The reversal of 20875245 is 54257802.

It is an interprime number because it is at equal distance from previous prime (20875241) and next prime (20875249).

It is not a de Polignac number, because 20875245 - 2² = 20875241 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20875241) 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, 21982 + ... + 22911.

It is an arithmetic number, because the mean of its divisors is an integer number (2154912).

Almost surely, 2^20875245 is an apocalyptic number.

It is an amenable number.

20875245 is a deficient number, since it is larger than the sum of its proper divisors (13603347).

20875245 is a wasteful number, since it uses less digits than its factorization.

20875245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44932.

The product of its (nonzero) digits is 22400, while the sum is 33.

The square root of 20875245 is about 4568.9435321527. The cubic root of 20875245 is about 275.3449995089.

The spelling of 20875245 in words is "twenty million, eight hundred seventy-five thousand, two hundred forty-five".