20043343251 has 6 divisors (see below), whose sum is σ = 28951495820. Its totient is φ = 13362228828.

The previous prime is 20043343237. The next prime is 20043343253. The reversal of 20043343251 is 15234334002.

20043343251 is a `hidden beast` number, since 2 + 0 + 0 + 4 + 334 + 325 + 1 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-20043343251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20043343253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1113519061 + ... + 1113519078.

Almost surely, 2^20043343251 is an apocalyptic number.

20043343251 is a deficient number, since it is larger than the sum of its proper divisors (8908152569).

20043343251 is a wasteful number, since it uses less digits than its factorization.

20043343251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2227038145 (or 2227038142 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 27.

Adding to 20043343251 its reverse (15234334002), we get a palindrome (35277677253).

The spelling of 20043343251 in words is "twenty billion, forty-three million, three hundred forty-three thousand, two hundred fifty-one".