21736361433643 has 8 divisors (see below), whose sum is σ = 21953286131616. Its totient is φ = 21519470328000.

The previous prime is 21736361433607. The next prime is 21736361433739. The reversal of 21736361433643 is 34633416363712.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21736361433643 - 2¹³ = 21736361425451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21736361434643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7096498 + ... + 9686743.

It is an arithmetic number, because the mean of its divisors is an integer number (2744160766452).

Almost surely, 2^{21736361433643} is an apocalyptic number.

21736361433643 is a deficient number, since it is larger than the sum of its proper divisors (216924697973).

21736361433643 is a wasteful number, since it uses less digits than its factorization.

21736361433643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16796165.

The product of its digits is 11757312, while the sum is 52.

The spelling of 21736361433643 in words is "twenty-one trillion, seven hundred thirty-six billion, three hundred sixty-one million, four hundred thirty-three thousand, six hundred forty-three".