20449875 has 32 divisors (see below), whose sum is σ = 35523072. Its totient is φ = 10428000.

The previous prime is 20449873. The next prime is 20449879. The reversal of 20449875 is 57894402.

It is not a de Polignac number, because 20449875 - 2¹ = 20449873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20449873) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7440 + ... + 9810.

It is an arithmetic number, because the mean of its divisors is an integer number (1110096).

Almost surely, 2^20449875 is an apocalyptic number.

20449875 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20449875 is a deficient number, since it is larger than the sum of its proper divisors (15073197).

20449875 is a wasteful number, since it uses less digits than its factorization.

20449875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2412 (or 2402 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 20449875 is about 4522.1538010112. The cubic root of 20449875 is about 273.4619371357.

The spelling of 20449875 in words is "twenty million, four hundred forty-nine thousand, eight hundred seventy-five".