20340432243 has 6 divisors (see below), whose sum is σ = 29380624364. Its totient is φ = 13560288156.

The previous prime is 20340432241. The next prime is 20340432253. The reversal of 20340432243 is 34223404302.

20340432243 is a `hidden beast` number, since 203 + 4 + 0 + 432 + 24 + 3 = 666.

It is not a de Polignac number, because 20340432243 - 2¹ = 20340432241 is a prime.

It is a super-2 number, since 2×20340432243² (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 (20340432241) 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 5 ways as a sum of consecutive naturals, for example, 1130024005 + ... + 1130024022.

Almost surely, 2^20340432243 is an apocalyptic number.

20340432243 is a deficient number, since it is larger than the sum of its proper divisors (9040192121).

20340432243 is a wasteful number, since it uses less digits than its factorization.

20340432243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2260048033 (or 2260048030 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 27.

Adding to 20340432243 its reverse (34223404302), we get a palindrome (54563836545).

It can be divided in two parts, 203404322 and 43, that added together give a triangular number (203404365 = T₂₀₁₆₉).

The spelling of 20340432243 in words is "twenty billion, three hundred forty million, four hundred thirty-two thousand, two hundred forty-three".