21773306005 has 8 divisors (see below), whose sum is σ = 28503237024. Its totient is φ = 15835131600.

The previous prime is 21773305969. The next prime is 21773306059. The reversal of 21773306005 is 50060337712.

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

It is not a de Polignac number, because 21773306005 - 2¹⁷ = 21773174933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 197939091 + ... + 197939200.

It is an arithmetic number, because the mean of its divisors is an integer number (3562904628).

Almost surely, 2^21773306005 is an apocalyptic number.

It is an amenable number.

21773306005 is a deficient number, since it is larger than the sum of its proper divisors (6729931019).

21773306005 is a wasteful number, since it uses less digits than its factorization.

21773306005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395878307.

The product of its (nonzero) digits is 26460, while the sum is 34.

The spelling of 21773306005 in words is "twenty-one billion, seven hundred seventy-three million, three hundred six thousand, five".