20402232143 has 2 divisors, whose sum is σ = 20402232144. Its totient is φ = 20402232142.

The previous prime is 20402232031. The next prime is 20402232223. The reversal of 20402232143 is 34123220402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20402232143 - 2¹⁶ = 20402166607 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20402282143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10201116071 + 10201116072.

It is an arithmetic number, because the mean of its divisors is an integer number (10201116072).

Almost surely, 2^20402232143 is an apocalyptic number.

20402232143 is a deficient number, since it is larger than the sum of its proper divisors (1).

20402232143 is an equidigital number, since it uses as much as digits as its factorization.

20402232143 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 20402232143 its reverse (34123220402), we get a palindrome (54525452545).

The spelling of 20402232143 in words is "twenty billion, four hundred two million, two hundred thirty-two thousand, one hundred forty-three".