20321420534364 has 48 divisors (see below), whose sum is σ = 51937099149600. Its totient is φ = 6155508043776.

The previous prime is 20321420534353. The next prime is 20321420534377. The reversal of 20321420534364 is 46343502412302.

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, 1717490749 + ... + 1717502580.

It is an arithmetic number, because the mean of its divisors is an integer number (1082022898950).

Almost surely, 2^{20321420534364} is an apocalyptic number.

It is an amenable number.

20321420534364 is an abundant number, since it is smaller than the sum of its proper divisors (31615678615236).

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

20321420534364 is a wasteful number, since it uses less digits than its factorization.

20321420534364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3434993382 (or 3434993380 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 39.

Adding to 20321420534364 its reverse (46343502412302), we get a palindrome (66664922946666).

The spelling of 20321420534364 in words is "twenty trillion, three hundred twenty-one billion, four hundred twenty million, five hundred thirty-four thousand, three hundred sixty-four".