21253182514 has 8 divisors (see below), whose sum is σ = 31880402028. Its totient is φ = 10626381840.

The previous prime is 21253182497. The next prime is 21253182521. The reversal of 21253182514 is 41528135212.

It can be written as a sum of positive squares in 2 ways, for example, as 20687931889 + 565250625 = 143833^2 + 23775^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 21253182514.

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, 111144 + ... + 234220.

Almost surely, 2^21253182514 is an apocalyptic number.

21253182514 is a deficient number, since it is larger than the sum of its proper divisors (10627219514).

21253182514 is a wasteful number, since it uses less digits than its factorization.

21253182514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209420.

The product of its digits is 19200, while the sum is 34.

The spelling of 21253182514 in words is "twenty-one billion, two hundred fifty-three million, one hundred eighty-two thousand, five hundred fourteen".