20321056426401 has 48 divisors (see below), whose sum is σ = 30502135834560. Its totient is φ = 13021072444800.

The previous prime is 20321056426393. The next prime is 20321056426421. The reversal of 20321056426401 is 10462465012302.

20321056426401 is a `hidden beast` number, since 2 + 0 + 3 + 2 + 1 + 0 + 5 + 6 + 4 + 2 + 640 + 1 = 666.

It is not a de Polignac number, because 20321056426401 - 2³ = 20321056426393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20321056426421) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 728783406 + ... + 728811288.

It is an arithmetic number, because the mean of its divisors is an integer number (635461163220).

Almost surely, 2^{20321056426401} is an apocalyptic number.

It is an amenable number.

20321056426401 is a deficient number, since it is larger than the sum of its proper divisors (10181079408159).

20321056426401 is a wasteful number, since it uses less digits than its factorization.

20321056426401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40446 (or 40443 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The spelling of 20321056426401 in words is "twenty trillion, three hundred twenty-one billion, fifty-six million, four hundred twenty-six thousand, four hundred one".