20448147 has 4 divisors (see below), whose sum is σ = 27264200. Its totient is φ = 13632096.

The previous prime is 20448133. The next prime is 20448163. The reversal of 20448147 is 74184402.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20448147 - 2⁷ = 20448019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20448247) 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, 3408022 + ... + 3408027.

It is an arithmetic number, because the mean of its divisors is an integer number (6816050).

Almost surely, 2^20448147 is an apocalyptic number.

20448147 is a deficient number, since it is larger than the sum of its proper divisors (6816053).

20448147 is an equidigital number, since it uses as much as digits as its factorization.

20448147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6816052.

The product of its (nonzero) digits is 7168, while the sum is 30.

The square root of 20448147 is about 4521.9627375731. The cubic root of 20448147 is about 273.4542344719.

The spelling of 20448147 in words is "twenty million, four hundred forty-eight thousand, one hundred forty-seven".