21233020233 has 16 divisors (see below), whose sum is σ = 28875436416. Its totient is φ = 13875281280.

The previous prime is 21233020231. The next prime is 21233020253. The reversal of 21233020233 is 33202033212.

It is not a de Polignac number, because 21233020233 - 2¹ = 21233020231 is a prime.

It is a super-3 number, since 3×21233020233³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (21233020231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 251260 + ... + 324957.

It is an arithmetic number, because the mean of its divisors is an integer number (1804714776).

Almost surely, 2^21233020233 is an apocalyptic number.

It is an amenable number.

21233020233 is a deficient number, since it is larger than the sum of its proper divisors (7642416183).

21233020233 is a wasteful number, since it uses less digits than its factorization.

21233020233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576464.

The product of its (nonzero) digits is 1296, while the sum is 21.

Adding to 21233020233 its reverse (33202033212), we get a palindrome (54435053445).

The spelling of 21233020233 in words is "twenty-one billion, two hundred thirty-three million, twenty thousand, two hundred thirty-three".