20043234157 has 2 divisors, whose sum is σ = 20043234158. Its totient is φ = 20043234156.

The previous prime is 20043234151. The next prime is 20043234173. The reversal of 20043234157 is 75143234002.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13139119876 + 6904114281 = 114626^2 + 83091^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20043234157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20043234151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10021617078 + 10021617079.

It is an arithmetic number, because the mean of its divisors is an integer number (10021617079).

Almost surely, 2^20043234157 is an apocalyptic number.

It is an amenable number.

20043234157 is a deficient number, since it is larger than the sum of its proper divisors (1).

20043234157 is an equidigital number, since it uses as much as digits as its factorization.

20043234157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 31.

Adding to 20043234157 its reverse (75143234002), we get a palindrome (95186468159).

The spelling of 20043234157 in words is "twenty billion, forty-three million, two hundred thirty-four thousand, one hundred fifty-seven".