20440446 has 32 divisors (see below), whose sum is σ = 44233728. Its totient is φ = 6259680.

The previous prime is 20440423. The next prime is 20440487. The reversal of 20440446 is 64404402.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20655 + ... + 21621.

It is an arithmetic number, because the mean of its divisors is an integer number (1382304).

Almost surely, 2^20440446 is an apocalyptic number.

20440446 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

20440446 is an abundant number, since it is smaller than the sum of its proper divisors (23793282).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20440446 is a wasteful number, since it uses less digits than its factorization.

20440446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1256.

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 20440446 is about 4521.1111466099. Note that the first 4 decimals coincide. The cubic root of 20440446 is about 273.4199015243.

Adding to 20440446 its reverse (64404402), we get a palindrome (84844848).

The spelling of 20440446 in words is "twenty million, four hundred forty thousand, four hundred forty-six".