21214638273 has 8 divisors (see below), whose sum is σ = 28300825408. Its totient is φ = 14135771664.

The previous prime is 21214638253. The next prime is 21214638307. The reversal of 21214638273 is 37283641212.

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

It is not a de Polignac number, because 21214638273 - 2⁹ = 21214637761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21214638253) by changing a digit.

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, 1823365 + ... + 1834962.

It is an arithmetic number, because the mean of its divisors is an integer number (3537603176).

Almost surely, 2^21214638273 is an apocalyptic number.

It is an amenable number.

21214638273 is a deficient number, since it is larger than the sum of its proper divisors (7086187135).

21214638273 is a wasteful number, since it uses less digits than its factorization.

21214638273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3660263.

The product of its digits is 96768, while the sum is 39.

The spelling of 21214638273 in words is "twenty-one billion, two hundred fourteen million, six hundred thirty-eight thousand, two hundred seventy-three".