21230177193 has 80 divisors (see below), whose sum is σ = 34810015680. Its totient is φ = 12847476096.

The previous prime is 21230177183. The next prime is 21230177207. The reversal of 21230177193 is 39177103212.

It is a happy number.

It is not a de Polignac number, because 21230177193 - 2¹⁰ = 21230176169 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21230177153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 3504355 + ... + 3510407.

It is an arithmetic number, because the mean of its divisors is an integer number (435125196).

Almost surely, 2^21230177193 is an apocalyptic number.

It is an amenable number.

21230177193 is a deficient number, since it is larger than the sum of its proper divisors (13579838487).

21230177193 is a wasteful number, since it uses less digits than its factorization.

21230177193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6180 (or 6171 counting only the distinct ones).

The product of its (nonzero) digits is 15876, while the sum is 36.

The spelling of 21230177193 in words is "twenty-one billion, two hundred thirty million, one hundred seventy-seven thousand, one hundred ninety-three".