27825022821 has 4 divisors (see below), whose sum is σ = 37100030432. Its totient is φ = 18550015212.

The previous prime is 27825022783. The next prime is 27825022829. The reversal of 27825022821 is 12822052872.

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 not a de Polignac number, because 27825022821 - 2²⁶ = 27757913957 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 27825022821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27825022829) 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, 4637503801 + ... + 4637503806.

It is an arithmetic number, because the mean of its divisors is an integer number (9275007608).

Almost surely, 2^27825022821 is an apocalyptic number.

It is an amenable number.

27825022821 is a deficient number, since it is larger than the sum of its proper divisors (9275007611).

27825022821 is an equidigital number, since it uses as much as digits as its factorization.

27825022821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9275007610.

The product of its (nonzero) digits is 71680, while the sum is 39.

The spelling of 27825022821 in words is "twenty-seven billion, eight hundred twenty-five million, twenty-two thousand, eight hundred twenty-one".