20321055523366 has 16 divisors (see below), whose sum is σ = 32827744268928. Its totient is φ = 9378541900800.

The previous prime is 20321055523343. The next prime is 20321055523423. The reversal of 20321055523366 is 66332555012302.

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 7 ways as a sum of consecutive naturals, for example, 16338715 + ... + 17538406.

It is an arithmetic number, because the mean of its divisors is an integer number (2051734016808).

Almost surely, 2^{20321055523366} is an apocalyptic number.

20321055523366 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

20321055523366 is a deficient number, since it is larger than the sum of its proper divisors (12506688745562).

20321055523366 is a wasteful number, since it uses less digits than its factorization.

20321055523366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33900207.

The product of its (nonzero) digits is 972000, while the sum is 43.

The spelling of 20321055523366 in words is "twenty trillion, three hundred twenty-one billion, fifty-five million, five hundred twenty-three thousand, three hundred sixty-six".