221670768023 has 4 divisors (see below), whose sum is σ = 229314587640. Its totient is φ = 214026948408.

The previous prime is 221670768019. The next prime is 221670768061. The reversal of 221670768023 is 320867076122.

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 221670768023 - 2² = 221670768019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221670768623) 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, 3821909765 + ... + 3821909822.

It is an arithmetic number, because the mean of its divisors is an integer number (57328646910).

Almost surely, 2^221670768023 is an apocalyptic number.

221670768023 is a deficient number, since it is larger than the sum of its proper divisors (7643819617).

221670768023 is an equidigital number, since it uses as much as digits as its factorization.

221670768023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7643819616.

The product of its (nonzero) digits is 338688, while the sum is 44.

The spelling of 221670768023 in words is "two hundred twenty-one billion, six hundred seventy million, seven hundred sixty-eight thousand, twenty-three".