20323256243436 has 144 divisors (see below), whose sum is σ = 54637937303040. Its totient is φ = 6351321507840.

The previous prime is 20323256243399. The next prime is 20323256243467. The reversal of 20323256243436 is 63434265232302.

20323256243436 is a `hidden beast` number, since 2 + 0 + 3 + 2 + 3 + 2 + 562 + 43 + 43 + 6 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 20323256243391 and 20323256243400.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 106357516 + ... + 106548428.

It is an arithmetic number, because the mean of its divisors is an integer number (379430120160).

Almost surely, 2^{20323256243436} 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 20323256243436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27318968651520).

20323256243436 is an abundant number, since it is smaller than the sum of its proper divisors (34314681059604).

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

20323256243436 is a wasteful number, since it uses less digits than its factorization.

20323256243436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192556 (or 192551 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 45.

The spelling of 20323256243436 in words is "twenty trillion, three hundred twenty-three billion, two hundred fifty-six million, two hundred forty-three thousand, four hundred thirty-six".