20446443 has 6 divisors (see below), whose sum is σ = 29533764. Its totient is φ = 13630956.

The previous prime is 20446441. The next prime is 20446463. The reversal of 20446443 is 34464402.

It is not a de Polignac number, because 20446443 - 2¹ = 20446441 is a prime.

It is a super-3 number, since 3×20446443³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (20446441) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1135905 + ... + 1135922.

It is an arithmetic number, because the mean of its divisors is an integer number (4922294).

Almost surely, 2^20446443 is an apocalyptic number.

20446443 is a deficient number, since it is larger than the sum of its proper divisors (9087321).

20446443 is a wasteful number, since it uses less digits than its factorization.

20446443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2271833 (or 2271830 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

The square root of 20446443 is about 4521.7743198882. The cubic root of 20446443 is about 273.4466383645.

The spelling of 20446443 in words is "twenty million, four hundred forty-six thousand, four hundred forty-three".