20423134234049 has 4 divisors (see below), whose sum is σ = 21624495071364. Its totient is φ = 19221773396736.

The previous prime is 20423134233989. The next prime is 20423134234079. The reversal of 20423134234049 is 94043243132402.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16973411214400 + 3449723019649 = 4119880^2 + 1857343^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20423134234049 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20423134233997 and 20423134234015.

It is not an unprimeable number, because it can be changed into a prime (20423134234079) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 600680418632 + ... + 600680418665.

It is an arithmetic number, because the mean of its divisors is an integer number (5406123767841).

Almost surely, 2^{20423134234049} is an apocalyptic number.

It is an amenable number.

20423134234049 is a deficient number, since it is larger than the sum of its proper divisors (1201360837315).

20423134234049 is a wasteful number, since it uses less digits than its factorization.

20423134234049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1201360837314.

The product of its (nonzero) digits is 497664, while the sum is 41.

The spelling of 20423134234049 in words is "twenty trillion, four hundred twenty-three billion, one hundred thirty-four million, two hundred thirty-four thousand, forty-nine".