20122323205656 has 64 divisors (see below), whose sum is σ = 57493647578880. Its totient is φ = 5749105645440.

The previous prime is 20122323205613. The next prime is 20122323205667. The reversal of 20122323205656 is 65650232322102.

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 15 ways as a sum of consecutive naturals, for example, 6255030 + ... + 8908986.

It is an arithmetic number, because the mean of its divisors is an integer number (898338243420).

Almost surely, 2^{20122323205656} is an apocalyptic number.

It is an amenable number.

20122323205656 is an abundant number, since it is smaller than the sum of its proper divisors (37371324373224).

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

20122323205656 is a wasteful number, since it uses less digits than its factorization.

20122323205656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2699104 (or 2699100 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 39.

Adding to 20122323205656 its reverse (65650232322102), we get a palindrome (85772555527758).

The spelling of 20122323205656 in words is "twenty trillion, one hundred twenty-two billion, three hundred twenty-three million, two hundred five thousand, six hundred fifty-six".