27636330421 has 4 divisors (see below), whose sum is σ = 31584377632. Its totient is φ = 23688283212.

The previous prime is 27636330389. The next prime is 27636330439. The reversal of 27636330421 is 12403363672.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 27636330421 - 2⁵ = 27636330389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27636330221) 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, 1974023595 + ... + 1974023608.

It is an arithmetic number, because the mean of its divisors is an integer number (7896094408).

Almost surely, 2^27636330421 is an apocalyptic number.

It is an amenable number.

27636330421 is a deficient number, since it is larger than the sum of its proper divisors (3948047211).

27636330421 is an equidigital number, since it uses as much as digits as its factorization.

27636330421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3948047210.

The product of its (nonzero) digits is 108864, while the sum is 37.

The spelling of 27636330421 in words is "twenty-seven billion, six hundred thirty-six million, three hundred thirty thousand, four hundred twenty-one".