27216018 has 24 divisors (see below), whose sum is σ = 62072400. Its totient is φ = 8594424.

The previous prime is 27216017. The next prime is 27216019. The reversal of 27216018 is 81061272.

It is an interprime number because it is at equal distance from previous prime (27216017) and next prime (27216019).

It is a junction number, because it is equal to n+sod(n) for n = 27215982 and 27216000.

It is not an unprimeable number, because it can be changed into a prime (27216011) 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, 39448 + ... + 40131.

It is an arithmetic number, because the mean of its divisors is an integer number (2586350).

Almost surely, 2^27216018 is an apocalyptic number.

27216018 is an abundant number, since it is smaller than the sum of its proper divisors (34856382).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

27216018 is a wasteful number, since it uses less digits than its factorization.

27216018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79606 (or 79603 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 27216018 is about 5216.8973537918. The cubic root of 27216018 is about 300.7979424113.

It can be divided in two parts, 272 and 16018, that added together give a triangular number (16290 = T₁₈₀).

The spelling of 27216018 in words is "twenty-seven million, two hundred sixteen thousand, eighteen".