20423134512344 has 16 divisors (see below), whose sum is σ = 38832720552720. Its totient is φ = 10067742364960.

The previous prime is 20423134512331. The next prime is 20423134512371. The reversal of 20423134512344 is 44321543132402.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20423134512298 and 20423134512307.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17978110799 + ... + 17978111934.

It is an arithmetic number, because the mean of its divisors is an integer number (2427045034545).

Almost surely, 2^{20423134512344} is an apocalyptic number.

It is an amenable number.

20423134512344 is a deficient number, since it is larger than the sum of its proper divisors (18409586040376).

20423134512344 is a wasteful number, since it uses less digits than its factorization.

20423134512344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35956222810 (or 35956222806 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 38.

Adding to 20423134512344 its reverse (44321543132402), we get a palindrome (64744677644746).

The spelling of 20423134512344 in words is "twenty trillion, four hundred twenty-three billion, one hundred thirty-four million, five hundred twelve thousand, three hundred forty-four".