21230730624173 has 16 divisors (see below), whose sum is σ = 24557080894080. Its totient is φ = 17977746384576.

The previous prime is 21230730624163. The next prime is 21230730624193. The reversal of 21230730624173 is 37142603703212.

It is a cyclic number.

It is not a de Polignac number, because 21230730624173 - 2³⁰ = 21229656882349 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21230730624173.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21230730624163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12955211 + ... + 14501687.

It is an arithmetic number, because the mean of its divisors is an integer number (1534817555880).

Almost surely, 2^{21230730624173} is an apocalyptic number.

It is an amenable number.

21230730624173 is a deficient number, since it is larger than the sum of its proper divisors (3326350269907).

21230730624173 is a wasteful number, since it uses less digits than its factorization.

21230730624173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1570196.

The product of its (nonzero) digits is 254016, while the sum is 41.

The spelling of 21230730624173 in words is "twenty-one trillion, two hundred thirty billion, seven hundred thirty million, six hundred twenty-four thousand, one hundred seventy-three".