21217272614 has 16 divisors (see below), whose sum is σ = 32918689440. Its totient is φ = 10249400640.

The previous prime is 21217272577. The next prime is 21217272623. The reversal of 21217272614 is 41627271212.

It is a Curzon number.

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 7 ways as a sum of consecutive naturals, for example, 1247609 + ... + 1264500.

It is an arithmetic number, because the mean of its divisors is an integer number (2057418090).

Almost surely, 2^21217272614 is an apocalyptic number.

21217272614 is a deficient number, since it is larger than the sum of its proper divisors (11701416826).

21217272614 is a wasteful number, since it uses less digits than its factorization.

21217272614 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2512255.

The product of its digits is 18816, while the sum is 35.

The spelling of 21217272614 in words is "twenty-one billion, two hundred seventeen million, two hundred seventy-two thousand, six hundred fourteen".