21252335228 has 12 divisors (see below), whose sum is σ = 37269234240. Its totient is φ = 10603982592.

The previous prime is 21252335227. The next prime is 21252335287. The reversal of 21252335228 is 82253325212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21252335227) 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, 5544101 + ... + 5547932.

It is an arithmetic number, because the mean of its divisors is an integer number (3105769520).

Almost surely, 2^21252335228 is an apocalyptic number.

It is an amenable number.

21252335228 is a deficient number, since it is larger than the sum of its proper divisors (16016899012).

21252335228 is a wasteful number, since it uses less digits than its factorization.

21252335228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11092516 (or 11092514 counting only the distinct ones).

The product of its digits is 57600, while the sum is 35.

The spelling of 21252335228 in words is "twenty-one billion, two hundred fifty-two million, three hundred thirty-five thousand, two hundred twenty-eight".