20421313103633 has 16 divisors (see below), whose sum is σ = 22001298149376. Its totient is φ = 18842631333120.

The previous prime is 20421313103629. The next prime is 20421313103663. The reversal of 20421313103633 is 33630131312402.

It is a cyclic number.

It is not a de Polignac number, because 20421313103633 - 2² = 20421313103629 is a prime.

It is a super-2 number, since 2×20421313103633² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20421313103633.

It is not an unprimeable number, because it can be changed into a prime (20421313103663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 896328560 + ... + 896351342.

It is an arithmetic number, because the mean of its divisors is an integer number (1375081134336).

Almost surely, 2^{20421313103633} is an apocalyptic number.

It is an amenable number.

20421313103633 is a deficient number, since it is larger than the sum of its proper divisors (1579985045743).

20421313103633 is a wasteful number, since it uses less digits than its factorization.

20421313103633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48344.

The product of its (nonzero) digits is 23328, while the sum is 32.

The spelling of 20421313103633 in words is "twenty trillion, four hundred twenty-one billion, three hundred thirteen million, one hundred three thousand, six hundred thirty-three".