18242847 has 24 divisors (see below), whose sum is σ = 31441200. Its totient is φ = 10423728.

The previous prime is 18242837. The next prime is 18242857. The reversal of 18242847 is 74824281.

It is an interprime number because it is at equal distance from previous prime (18242837) and next prime (18242857).

It is not a de Polignac number, because 18242847 - 2¹⁴ = 18226463 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18242837) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5572 + ... + 8217.

It is an arithmetic number, because the mean of its divisors is an integer number (1310050).

Almost surely, 2^18242847 is an apocalyptic number.

18242847 is a deficient number, since it is larger than the sum of its proper divisors (13198353).

18242847 is a wasteful number, since it uses less digits than its factorization.

18242847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13812 (or 13799 counting only the distinct ones).

The product of its digits is 28672, while the sum is 36.

The square root of 18242847 is about 4271.1645952831. The cubic root of 18242847 is about 263.2474695579.

The spelling of 18242847 in words is "eighteen million, two hundred forty-two thousand, eight hundred forty-seven".