20134400243 has 2 divisors, whose sum is σ = 20134400244. Its totient is φ = 20134400242.

The previous prime is 20134400213. The next prime is 20134400269. The reversal of 20134400243 is 34200443102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20134400243 - 2¹² = 20134396147 is a prime.

It is not a weakly prime, because it can be changed into another prime (20134400213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10067200121 + 10067200122.

It is an arithmetic number, because the mean of its divisors is an integer number (10067200122).

Almost surely, 2^20134400243 is an apocalyptic number.

20134400243 is a deficient number, since it is larger than the sum of its proper divisors (1).

20134400243 is an equidigital number, since it uses as much as digits as its factorization.

20134400243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 20134400243 its reverse (34200443102), we get a palindrome (54334843345).

The spelling of 20134400243 in words is "twenty billion, one hundred thirty-four million, four hundred thousand, two hundred forty-three".