21234175722 has 12 divisors (see below), whose sum is σ = 46007380770. Its totient is φ = 7078058568.

The previous prime is 21234175693. The next prime is 21234175723. The reversal of 21234175722 is 22757143212.

21234175722 is a `hidden beast` number, since 21 + 23 + 41 + 7 + 572 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 16692898401 + 4541277321 = 129201^2 + 67389^2 .

It is not an unprimeable number, because it can be changed into a prime (21234175723) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 589838197 + ... + 589838232.

Almost surely, 2^21234175722 is an apocalyptic number.

21234175722 is an abundant number, since it is smaller than the sum of its proper divisors (24773205048).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21234175722 is a wasteful number, since it uses less digits than its factorization.

21234175722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1179676437 (or 1179676434 counting only the distinct ones).

The product of its digits is 47040, while the sum is 36.

The spelling of 21234175722 in words is "twenty-one billion, two hundred thirty-four million, one hundred seventy-five thousand, seven hundred twenty-two".