21210433332 has 24 divisors (see below), whose sum is σ = 53990194272. Its totient is φ = 6427404000.

The previous prime is 21210433327. The next prime is 21210433357. The reversal of 21210433332 is 23333401212.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 80342419 + ... + 80342682.

It is an arithmetic number, because the mean of its divisors is an integer number (2249591428).

Almost surely, 2^21210433332 is an apocalyptic number.

21210433332 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21210433332 is an abundant number, since it is smaller than the sum of its proper divisors (32779760940).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21210433332 is a wasteful number, since it uses less digits than its factorization.

21210433332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160685119 (or 160685117 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 24.

Adding to 21210433332 its reverse (23333401212), we get a palindrome (44543834544).

The spelling of 21210433332 in words is "twenty-one billion, two hundred ten million, four hundred thirty-three thousand, three hundred thirty-two".