20423111213044 has 12 divisors (see below), whose sum is σ = 35740668140100. Its totient is φ = 10211491744448.

The previous prime is 20423111212997. The next prime is 20423111213081. The reversal of 20423111213044 is 44031211132402.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 12523020508944 + 7900090704100 = 3538788^2 + 2810710^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15242329 + ... + 16528000.

It is an arithmetic number, because the mean of its divisors is an integer number (2978389011675).

Almost surely, 2^{20423111213044} is an apocalyptic number.

It is an amenable number.

20423111213044 is a deficient number, since it is larger than the sum of its proper divisors (15317556927056).

20423111213044 is a wasteful number, since it uses less digits than its factorization.

20423111213044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31931042 (or 31931040 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 20423111213044 its reverse (44031211132402), we get a palindrome (64454322345446).

The spelling of 20423111213044 in words is "twenty trillion, four hundred twenty-three billion, one hundred eleven million, two hundred thirteen thousand, forty-four".