27921319351 has 4 divisors (see below), whose sum is σ = 28822007104. Its totient is φ = 27020631600.

The previous prime is 27921319313. The next prime is 27921319381. The reversal of 27921319351 is 15391312972.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 27921319351 - 2¹⁵ = 27921286583 is a prime.

It is a super-2 number, since 2×27921319351² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27921319298 and 27921319307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27921319381) 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 3 ways as a sum of consecutive naturals, for example, 450343830 + ... + 450343891.

It is an arithmetic number, because the mean of its divisors is an integer number (7205501776).

Almost surely, 2^27921319351 is an apocalyptic number.

27921319351 is a deficient number, since it is larger than the sum of its proper divisors (900687753).

27921319351 is an equidigital number, since it uses as much as digits as its factorization.

27921319351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 900687752.

The product of its digits is 102060, while the sum is 43.

The spelling of 27921319351 in words is "twenty-seven billion, nine hundred twenty-one million, three hundred nineteen thousand, three hundred fifty-one".