20123546544444 has 240 divisors, whose sum is σ = 56568989546496. Its totient is φ = 5561707132800.

The previous prime is 20123546544427. The next prime is 20123546544457. The reversal of 20123546544444 is 44444564532102.

It is a junction number, because it is equal to n+sod(n) for n = 20123546544393 and 20123546544402.

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 79 ways as a sum of consecutive naturals, for example, 3364575934 + ... + 3364581914.

Almost surely, 2^{20123546544444} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20123546544444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28284494773248).

20123546544444 is an abundant number, since it is smaller than the sum of its proper divisors (36445443002052).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20123546544444 is a wasteful number, since it uses less digits than its factorization.

20123546544444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9814 (or 9791 counting only the distinct ones).

The product of its (nonzero) digits is 7372800, while the sum is 48.

The spelling of 20123546544444 in words is "twenty trillion, one hundred twenty-three billion, five hundred forty-six million, five hundred forty-four thousand, four hundred forty-four".