20448172 has 12 divisors (see below), whose sum is σ = 35816256. Its totient is φ = 10214960.

The previous prime is 20448163. The next prime is 20448179. The reversal of 20448172 is 27184402.

It is a self number, because there is not a number n which added to its sum of digits gives 20448172.

It is not an unprimeable number, because it can be changed into a prime (20448179) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6597 + ... + 9187.

It is an arithmetic number, because the mean of its divisors is an integer number (2984688).

Almost surely, 2^20448172 is an apocalyptic number.

It is an amenable number.

20448172 is a deficient number, since it is larger than the sum of its proper divisors (15368084).

20448172 is a wasteful number, since it uses less digits than its factorization.

20448172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4568 (or 4566 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 28.

The square root of 20448172 is about 4521.9655018587. The cubic root of 20448172 is about 273.4543459140.

The spelling of 20448172 in words is "twenty million, four hundred forty-eight thousand, one hundred seventy-two".