21046332207 has 4 divisors (see below), whose sum is σ = 28061776280. Its totient is φ = 14030888136.

The previous prime is 21046332173. The next prime is 21046332221. The reversal of 21046332207 is 70223364012.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 21046332207 - 2⁶ = 21046332143 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 (21046332247) 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, 3507722032 + ... + 3507722037.

It is an arithmetic number, because the mean of its divisors is an integer number (7015444070).

Almost surely, 2^21046332207 is an apocalyptic number.

21046332207 is a deficient number, since it is larger than the sum of its proper divisors (7015444073).

21046332207 is an equidigital number, since it uses as much as digits as its factorization.

21046332207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7015444072.

The product of its (nonzero) digits is 12096, while the sum is 30.

Adding to 21046332207 its reverse (70223364012), we get a palindrome (91269696219).

The spelling of 21046332207 in words is "twenty-one billion, forty-six million, three hundred thirty-two thousand, two hundred seven".