27224623021 has 4 divisors (see below), whose sum is σ = 28826071452. Its totient is φ = 25623174592.

The previous prime is 27224623009. The next prime is 27224623031. The reversal of 27224623021 is 12032642272.

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 16535130921 + 10689492100 = 128589^2 + 103390^2 .

It is a cyclic number.

It is not a de Polignac number, because 27224623021 - 2⁵ = 27224622989 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 (27224623031) 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, 800724190 + ... + 800724223.

It is an arithmetic number, because the mean of its divisors is an integer number (7206517863).

Almost surely, 2^27224623021 is an apocalyptic number.

It is an amenable number.

27224623021 is a deficient number, since it is larger than the sum of its proper divisors (1601448431).

27224623021 is a wasteful number, since it uses less digits than its factorization.

27224623021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1601448430.

The product of its (nonzero) digits is 16128, while the sum is 31.

The spelling of 27224623021 in words is "twenty-seven billion, two hundred twenty-four million, six hundred twenty-three thousand, twenty-one".