20443944 has 16 divisors (see below), whose sum is σ = 51109920. Its totient is φ = 6814640.

The previous prime is 20443939. The next prime is 20443957. The reversal of 20443944 is 44934402.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 425892 + ... + 425939.

It is an arithmetic number, because the mean of its divisors is an integer number (3194370).

Almost surely, 2^20443944 is an apocalyptic number.

20443944 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20443944 is an abundant number, since it is smaller than the sum of its proper divisors (30665976).

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

20443944 is a wasteful number, since it uses less digits than its factorization.

20443944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 851840 (or 851836 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 20443944 is about 4521.4979818640. The cubic root of 20443944 is about 273.4354975353.

The spelling of 20443944 in words is "twenty million, four hundred forty-three thousand, nine hundred forty-four".