21500322214 has 48 divisors (see below), whose sum is σ = 41207443200. Its totient is φ = 8349896016.

The previous prime is 21500322197. The next prime is 21500322253. The reversal of 21500322214 is 41222300512.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 208194 + ... + 293845.

It is an arithmetic number, because the mean of its divisors is an integer number (858488400).

Almost surely, 2^21500322214 is an apocalyptic number.

21500322214 is a deficient number, since it is larger than the sum of its proper divisors (19707120986).

21500322214 is a wasteful number, since it uses less digits than its factorization.

21500322214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502097 (or 502090 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

Adding to 21500322214 its reverse (41222300512), we get a palindrome (62722622726).

The spelling of 21500322214 in words is "twenty-one billion, five hundred million, three hundred twenty-two thousand, two hundred fourteen".