20301905356668 has 144 divisors (see below), whose sum is σ = 56556012569056. Its totient is φ = 6100986769920.

The previous prime is 20301905356619. The next prime is 20301905356679. The reversal of 20301905356668 is 86665350910302.

It is a happy number.

It is a super-2 number, since 2×20301905356668² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 319476978 + ... + 319540518.

Almost surely, 2^{20301905356668} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20301905356668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28278006284528).

20301905356668 is an abundant number, since it is smaller than the sum of its proper divisors (36254107212388).

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

20301905356668 is a wasteful number, since it uses less digits than its factorization.

20301905356668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79484 (or 79479 counting only the distinct ones).

The product of its (nonzero) digits is 6998400, while the sum is 54.

The spelling of 20301905356668 in words is "twenty trillion, three hundred one billion, nine hundred five million, three hundred fifty-six thousand, six hundred sixty-eight".