20321055636423 has 16 divisors (see below), whose sum is σ = 27117120715776. Its totient is φ = 13536184819520.

The previous prime is 20321055636421. The next prime is 20321055636433. The reversal of 20321055636423 is 32463655012302.

It is a cyclic number.

It is not a de Polignac number, because 20321055636423 - 2¹ = 20321055636421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20321055636421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18329290 + ... + 19406312.

It is an arithmetic number, because the mean of its divisors is an integer number (1694820044736).

Almost surely, 2^{20321055636423} is an apocalyptic number.

20321055636423 is a deficient number, since it is larger than the sum of its proper divisors (6796065079353).

20321055636423 is a wasteful number, since it uses less digits than its factorization.

20321055636423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1082214.

The product of its (nonzero) digits is 777600, while the sum is 42.

The spelling of 20321055636423 in words is "twenty trillion, three hundred twenty-one billion, fifty-five million, six hundred thirty-six thousand, four hundred twenty-three".