21213002432 has 14 divisors (see below), whose sum is σ = 42094551828. Its totient is φ = 10606501184.

The previous prime is 21213002417. The next prime is 21213002453. The reversal of 21213002432 is 23420031212.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165726518 + ... + 165726645.

It is an arithmetic number, because the mean of its divisors is an integer number (3006753702).

Almost surely, 2^21213002432 is an apocalyptic number.

It is an amenable number.

21213002432 is a deficient number, since it is larger than the sum of its proper divisors (20881549396).

21213002432 is an equidigital number, since it uses as much as digits as its factorization.

21213002432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331453175 (or 331453165 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21213002432 its reverse (23420031212), we get a palindrome (44633033644).

The spelling of 21213002432 in words is "twenty-one billion, two hundred thirteen million, two thousand, four hundred thirty-two".