21032230233 has 16 divisors (see below), whose sum is σ = 32164822400. Its totient is φ = 11975026176.

The previous prime is 21032230231. The next prime is 21032230259. The reversal of 21032230233 is 33203223012.

It is not a de Polignac number, because 21032230233 - 2¹ = 21032230231 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21032230231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1802008 + ... + 1813641.

It is an arithmetic number, because the mean of its divisors is an integer number (2010301400).

Almost surely, 2^21032230233 is an apocalyptic number.

It is an amenable number.

21032230233 is a deficient number, since it is larger than the sum of its proper divisors (11132592167).

21032230233 is a wasteful number, since it uses less digits than its factorization.

21032230233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3615936.

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

Adding to 21032230233 its reverse (33203223012), we get a palindrome (54235453245).

The spelling of 21032230233 in words is "twenty-one billion, thirty-two million, two hundred thirty thousand, two hundred thirty-three".