27732420073 has 4 divisors (see below), whose sum is σ = 27732978900. Its totient is φ = 27731861248.

The previous prime is 27732420071. The next prime is 27732420097. The reversal of 27732420073 is 37002423772.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 20365287849 + 7367132224 = 142707^2 + 85832^2 .

It is a cyclic number.

It is not a de Polignac number, because 27732420073 - 2¹ = 27732420071 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27732420071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 196840 + ... + 306937.

It is an arithmetic number, because the mean of its divisors is an integer number (6933244725).

Almost surely, 2^27732420073 is an apocalyptic number.

It is an amenable number.

27732420073 is a deficient number, since it is larger than the sum of its proper divisors (558827).

27732420073 is an equidigital number, since it uses as much as digits as its factorization.

27732420073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 558826.

The product of its (nonzero) digits is 98784, while the sum is 37.

The spelling of 27732420073 in words is "twenty-seven billion, seven hundred thirty-two million, four hundred twenty thousand, seventy-three".