21572458514 has 8 divisors (see below), whose sum is σ = 32397723660. Its totient is φ = 10773217296.

The previous prime is 21572458493. The next prime is 21572458543. The reversal of 21572458514 is 41585427512.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20971963489 + 600495025 = 144817^2 + 24505^2 .

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

It is a Curzon 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 3 ways as a sum of consecutive naturals, for example, 6503909 + ... + 6507224.

Almost surely, 2^21572458514 is an apocalyptic number.

21572458514 is a deficient number, since it is larger than the sum of its proper divisors (10825265146).

21572458514 is a wasteful number, since it uses less digits than its factorization.

21572458514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13011964.

The product of its digits is 448000, while the sum is 44.

The spelling of 21572458514 in words is "twenty-one billion, five hundred seventy-two million, four hundred fifty-eight thousand, five hundred fourteen".