21430741173 has 8 divisors (see below), whose sum is σ = 28633977600. Its totient is φ = 14257332768.

The previous prime is 21430741153. The next prime is 21430741243. The reversal of 21430741173 is 37114703412.

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

It is not a de Polignac number, because 21430741173 - 2¹⁸ = 21430479029 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21430741133) 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, 7455328 + ... + 7458201.

It is an arithmetic number, because the mean of its divisors is an integer number (3579247200).

Almost surely, 2^21430741173 is an apocalyptic number.

It is an amenable number.

21430741173 is a deficient number, since it is larger than the sum of its proper divisors (7203236427).

21430741173 is a wasteful number, since it uses less digits than its factorization.

21430741173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14914011.

The product of its (nonzero) digits is 14112, while the sum is 33.

The spelling of 21430741173 in words is "twenty-one billion, four hundred thirty million, seven hundred forty-one thousand, one hundred seventy-three".