20643883241658 has 32 divisors (see below), whose sum is σ = 41508181296000. Its totient is φ = 6844580176896.

The previous prime is 20643883241621. The next prime is 20643883241711. The reversal of 20643883241658 is 85614238834602.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1137610 + ... + 6525482.

It is an arithmetic number, because the mean of its divisors is an integer number (1297130665500).

Almost surely, 2^{20643883241658} is an apocalyptic number.

20643883241658 is an abundant number, since it is smaller than the sum of its proper divisors (20864298054342).

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

20643883241658 is a wasteful number, since it uses less digits than its factorization.

20643883241658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5391286.

The product of its (nonzero) digits is 53084160, while the sum is 60.

The spelling of 20643883241658 in words is "twenty trillion, six hundred forty-three billion, eight hundred eighty-three million, two hundred forty-one thousand, six hundred fifty-eight".