20213681861363 has 4 divisors (see below), whose sum is σ = 20214070122960. Its totient is φ = 20213293599768.

The previous prime is 20213681861341. The next prime is 20213681861423. The reversal of 20213681861363 is 36316818631202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20213681861363 - 2⁶ = 20213681861299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20213681863363) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 194052695 + ... + 194156832.

It is an arithmetic number, because the mean of its divisors is an integer number (5053517530740).

Almost surely, 2^{20213681861363} is an apocalyptic number.

20213681861363 is a deficient number, since it is larger than the sum of its proper divisors (388261597).

20213681861363 is an equidigital number, since it uses as much as digits as its factorization.

20213681861363 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388261596.

The product of its (nonzero) digits is 1492992, while the sum is 50.

The spelling of 20213681861363 in words is "twenty trillion, two hundred thirteen billion, six hundred eighty-one million, eight hundred sixty-one thousand, three hundred sixty-three".