20449275 has 48 divisors (see below), whose sum is σ = 42163968. Its totient is φ = 8496000.

The previous prime is 20449267. The next prime is 20449279. The reversal of 20449275 is 57294402.

It is not a de Polignac number, because 20449275 - 2³ = 20449267 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (20449279) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4005 + ... + 7545.

It is an arithmetic number, because the mean of its divisors is an integer number (878416).

Almost surely, 2^20449275 is an apocalyptic number.

20449275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20449275 is an abundant number, since it is smaller than the sum of its proper divisors (21714693).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20449275 is a wasteful number, since it uses less digits than its factorization.

20449275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3572 (or 3567 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 20449275 is about 4522.0874604545. The cubic root of 20449275 is about 273.4592626488.

The spelling of 20449275 in words is "twenty million, four hundred forty-nine thousand, two hundred seventy-five".