21523533334 has 8 divisors (see below), whose sum is σ = 32294459160. Its totient is φ = 10758713616.

The previous prime is 21523533289. The next prime is 21523533373. The reversal of 21523533334 is 43333532512.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21523533334.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1517704 + ... + 1531819.

It is an arithmetic number, because the mean of its divisors is an integer number (4036807395).

Almost surely, 2^21523533334 is an apocalyptic number.

21523533334 is a deficient number, since it is larger than the sum of its proper divisors (10770925826).

21523533334 is a wasteful number, since it uses less digits than its factorization.

21523533334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3053054.

The product of its digits is 97200, while the sum is 34.

The spelling of 21523533334 in words is "twenty-one billion, five hundred twenty-three million, five hundred thirty-three thousand, three hundred thirty-four".