21234175293 has 4 divisors (see below), whose sum is σ = 28312233728. Its totient is φ = 14156116860.

The previous prime is 21234175189. The next prime is 21234175321. The reversal of 21234175293 is 39257143212.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 21234175293 - 2⁹ = 21234174781 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 (21234175393) 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, 3539029213 + ... + 3539029218.

It is an arithmetic number, because the mean of its divisors is an integer number (7078058432).

Almost surely, 2^21234175293 is an apocalyptic number.

It is an amenable number.

21234175293 is a deficient number, since it is larger than the sum of its proper divisors (7078058435).

21234175293 is an equidigital number, since it uses as much as digits as its factorization.

21234175293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7078058434.

The product of its digits is 90720, while the sum is 39.

The spelling of 21234175293 in words is "twenty-one billion, two hundred thirty-four million, one hundred seventy-five thousand, two hundred ninety-three".