21753366334 has 16 divisors (see below), whose sum is σ = 37297980000. Its totient is φ = 9321247584.

The previous prime is 21753366329. The next prime is 21753366337. The reversal of 21753366334 is 43366335712.

It is a happy number.

It is a super-2 number, since 2×21753366334² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21753366337) 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, 50209 + ... + 214540.

It is an arithmetic number, because the mean of its divisors is an integer number (2331123750).

Almost surely, 2^21753366334 is an apocalyptic number.

21753366334 is a deficient number, since it is larger than the sum of its proper divisors (15544613666).

21753366334 is a wasteful number, since it uses less digits than its factorization.

21753366334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270627.

The product of its digits is 816480, while the sum is 43.

The spelling of 21753366334 in words is "twenty-one billion, seven hundred fifty-three million, three hundred sixty-six thousand, three hundred thirty-four".