20446049 has 4 divisors (see below), whose sum is σ = 22018836. Its totient is φ = 18873264.

The previous prime is 20446031. The next prime is 20446051. The reversal of 20446049 is 94064402.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5569600 + 14876449 = 2360^2 + 3857^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20446049 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20446009) 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, 786374 + ... + 786399.

It is an arithmetic number, because the mean of its divisors is an integer number (5504709).

Almost surely, 2^20446049 is an apocalyptic number.

It is an amenable number.

20446049 is a deficient number, since it is larger than the sum of its proper divisors (1572787).

20446049 is a wasteful number, since it uses less digits than its factorization.

20446049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1572786.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 20446049 is about 4521.7307527096. The cubic root of 20446049 is about 273.4448819275. Note that the first 3 decimals are identical.

The spelling of 20446049 in words is "twenty million, four hundred forty-six thousand, forty-nine".