20443432 has 8 divisors (see below), whose sum is σ = 38331450. Its totient is φ = 10221712.

The previous prime is 20443417. The next prime is 20443433. The reversal of 20443432 is 23434402.

It can be written as a sum of positive squares in only one way, i.e., 18028516 + 2414916 = 4246^2 + 1554^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (20443433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1277707 + ... + 1277722.

Almost surely, 2^20443432 is an apocalyptic number.

It is an amenable number.

20443432 is a deficient number, since it is larger than the sum of its proper divisors (17888018).

20443432 is a wasteful number, since it uses less digits than its factorization.

20443432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2555435 (or 2555431 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 22.

The square root of 20443432 is about 4521.4413631054. The cubic root of 20443432 is about 273.4332148684.

Adding to 20443432 its reverse (23434402), we get a palindrome (43877834).

It can be divided in two parts, 2044 and 3432, that added together give a square (5476 = 74²).

The spelling of 20443432 in words is "twenty million, four hundred forty-three thousand, four hundred thirty-two".