27221018 has 16 divisors (see below), whose sum is σ = 44664480. Its totient is φ = 12339600.

The previous prime is 27221017. The next prime is 27221023. The reversal of 27221018 is 81012272.

It is a junction number, because it is equal to n+sod(n) for n = 27220984 and 27221002.

It is not an unprimeable number, because it can be changed into a prime (27221017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7793 + ... + 10731.

It is an arithmetic number, because the mean of its divisors is an integer number (2791530).

Almost surely, 2^27221018 is an apocalyptic number.

27221018 is a deficient number, since it is larger than the sum of its proper divisors (17443462).

27221018 is a wasteful number, since it uses less digits than its factorization.

27221018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3373.

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 27221018 is about 5217.3765438197. The cubic root of 27221018 is about 300.8163616822.

The spelling of 27221018 in words is "twenty-seven million, two hundred twenty-one thousand, eighteen".