21751453214 has 8 divisors (see below), whose sum is σ = 32798003328. Its totient is φ = 10818785440.

The previous prime is 21751453193. The next prime is 21751453247. The reversal of 21751453214 is 41235415712.

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 28470107 + ... + 28470870.

It is an arithmetic number, because the mean of its divisors is an integer number (4099750416).

Almost surely, 2^21751453214 is an apocalyptic number.

21751453214 is a deficient number, since it is larger than the sum of its proper divisors (11046550114).

21751453214 is a wasteful number, since it uses less digits than its factorization.

21751453214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56941170.

The product of its digits is 33600, while the sum is 35.

Adding to 21751453214 its reverse (41235415712), we get a palindrome (62986868926).

The spelling of 21751453214 in words is "twenty-one billion, seven hundred fifty-one million, four hundred fifty-three thousand, two hundred fourteen".