20338449 has 16 divisors (see below), whose sum is σ = 28114944. Its totient is φ = 13064400.

The previous prime is 20338433. The next prime is 20338469. The reversal of 20338449 is 94483302.

It is not a de Polignac number, because 20338449 - 2⁴ = 20338433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20338469) 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, 35334 + ... + 35904.

It is an arithmetic number, because the mean of its divisors is an integer number (1757184).

Almost surely, 2^20338449 is an apocalyptic number.

It is an amenable number.

20338449 is a deficient number, since it is larger than the sum of its proper divisors (7776495).

20338449 is a wasteful number, since it uses less digits than its factorization.

20338449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 988.

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 20338449 is about 4509.8169585916. The cubic root of 20338449 is about 272.9643582124.

The spelling of 20338449 in words is "twenty million, three hundred thirty-eight thousand, four hundred forty-nine".