20443408 has 20 divisors (see below), whose sum is σ = 39689548. Its totient is φ = 10200960.

The previous prime is 20443403. The next prime is 20443417. The reversal of 20443408 is 80434402.

It can be written as a sum of positive squares in 2 ways, for example, as 15116544 + 5326864 = 3888^2 + 2308^2 .

It is not an unprimeable number, because it can be changed into a prime (20443403) 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, 9610 + ... + 11542.

Almost surely, 2^20443408 is an apocalyptic number.

It is an amenable number.

20443408 is a deficient number, since it is larger than the sum of its proper divisors (19246140).

20443408 is a wasteful number, since it uses less digits than its factorization.

20443408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2602 (or 2596 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

The square root of 20443408 is about 4521.4387090836. The cubic root of 20443408 is about 273.4331078674.

The spelling of 20443408 in words is "twenty million, four hundred forty-three thousand, four hundred eight".