27323821 has 12 divisors (see below), whose sum is σ = 31896288. Its totient is φ = 23338392.

The previous prime is 27323819. The next prime is 27323831. The reversal of 27323821 is 12832372.

It is not a de Polignac number, because 27323821 - 2¹ = 27323819 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 27323821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27323831) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16200 + ... + 17806.

It is an arithmetic number, because the mean of its divisors is an integer number (2658024).

Almost surely, 2^27323821 is an apocalyptic number.

It is an amenable number.

27323821 is a deficient number, since it is larger than the sum of its proper divisors (4572467).

27323821 is a wasteful number, since it uses less digits than its factorization.

27323821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1968 (or 1961 counting only the distinct ones).

The product of its digits is 4032, while the sum is 28.

The square root of 27323821 is about 5227.2192416236. The cubic root of 27323821 is about 301.1945740331.

The spelling of 27323821 in words is "twenty-seven million, three hundred twenty-three thousand, eight hundred twenty-one".