20321123234043 has 16 divisors (see below), whose sum is σ = 27209551349376. Its totient is φ = 13490154289920.

The previous prime is 20321123234039. The next prime is 20321123234081. The reversal of 20321123234043 is 34043232112302.

It is a happy number.

It is not a de Polignac number, because 20321123234043 - 2² = 20321123234039 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20321123234043.

It is not an unprimeable number, because it can be changed into a prime (20321123234543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11551446 + ... + 13193867.

It is an arithmetic number, because the mean of its divisors is an integer number (1700596959336).

Almost surely, 2^{20321123234043} is an apocalyptic number.

20321123234043 is a deficient number, since it is larger than the sum of its proper divisors (6888428115333).

20321123234043 is a wasteful number, since it uses less digits than its factorization.

20321123234043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24746474.

The product of its (nonzero) digits is 20736, while the sum is 30.

Adding to 20321123234043 its reverse (34043232112302), we get a palindrome (54364355346345).

The spelling of 20321123234043 in words is "twenty trillion, three hundred twenty-one billion, one hundred twenty-three million, two hundred thirty-four thousand, forty-three".