20040449 has 8 divisors (see below), whose sum is σ = 23544192. Its totient is φ = 16817040.

The previous prime is 20040443. The next prime is 20040463. The reversal of 20040449 is 94404002.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20040449 - 2²⁴ = 3263233 is a prime.

It is a super-2 number, since 2×20040449² = 803239192243202, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20040443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69929 + ... + 70214.

It is an arithmetic number, because the mean of its divisors is an integer number (2943024).

Almost surely, 2^20040449 is an apocalyptic number.

It is an amenable number.

20040449 is a deficient number, since it is larger than the sum of its proper divisors (3503743).

20040449 is a wasteful number, since it uses less digits than its factorization.

20040449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140167.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 20040449 is about 4476.6560064405. The cubic root of 20040449 is about 271.6246308972.

The spelling of 20040449 in words is "twenty million, forty thousand, four hundred forty-nine".