21022233253 has 8 divisors (see below), whose sum is σ = 24208810560. Its totient is φ = 17881506240.

The previous prime is 21022233229. The next prime is 21022233259. The reversal of 21022233253 is 35233222012.

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

It is a cyclic number.

It is not a de Polignac number, because 21022233253 - 2¹⁷ = 21022102181 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 (21022233259) 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, 11461588 + ... + 11463421.

It is an arithmetic number, because the mean of its divisors is an integer number (3026101320).

Almost surely, 2^21022233253 is an apocalyptic number.

It is an amenable number.

21022233253 is a deficient number, since it is larger than the sum of its proper divisors (3186577307).

21022233253 is a wasteful number, since it uses less digits than its factorization.

21022233253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22925147.

The product of its (nonzero) digits is 4320, while the sum is 25.

Adding to 21022233253 its reverse (35233222012), we get a palindrome (56255455265).

The spelling of 21022233253 in words is "twenty-one billion, twenty-two million, two hundred thirty-three thousand, two hundred fifty-three".