21233265207 has 24 divisors (see below), whose sum is σ = 35927160192. Its totient is φ = 11030266800.

The previous prime is 21233265203. The next prime is 21233265241. The reversal of 21233265207 is 70256233212.

It is not a de Polignac number, because 21233265207 - 2² = 21233265203 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21233265203) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6564019 + ... + 6567252.

It is an arithmetic number, because the mean of its divisors is an integer number (1496965008).

Almost surely, 2^21233265207 is an apocalyptic number.

21233265207 is a deficient number, since it is larger than the sum of its proper divisors (14693894985).

21233265207 is a wasteful number, since it uses less digits than its factorization.

21233265207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13131299 (or 13131292 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 33.

Adding to 21233265207 its reverse (70256233212), we get a palindrome (91489498419).

The spelling of 21233265207 in words is "twenty-one billion, two hundred thirty-three million, two hundred sixty-five thousand, two hundred seven".