20432402243 has 32 divisors (see below), whose sum is σ = 22828925952. Its totient is φ = 18132660000.

The previous prime is 20432402227. The next prime is 20432402257. The reversal of 20432402243 is 34220423402.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20432402243 - 2⁴ = 20432402227 is a prime.

It is a super-2 number, since 2×20432402243² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20432402213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37353296 + ... + 37353842.

It is an arithmetic number, because the mean of its divisors is an integer number (713403936).

Almost surely, 2^20432402243 is an apocalyptic number.

20432402243 is a deficient number, since it is larger than the sum of its proper divisors (2396523709).

20432402243 is a wasteful number, since it uses less digits than its factorization.

20432402243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1055.

The product of its (nonzero) digits is 9216, while the sum is 26.

Adding to 20432402243 its reverse (34220423402), we get a palindrome (54652825645).

The spelling of 20432402243 in words is "twenty billion, four hundred thirty-two million, four hundred two thousand, two hundred forty-three".