18274151 has 12 divisors (see below), whose sum is σ = 21420336. Its totient is φ = 15271680.

The previous prime is 18274127. The next prime is 18274169. The reversal of 18274151 is 15147281.

It is a de Polignac number, because none of the positive numbers 2^k-18274151 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18274111) 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, 10991 + ... + 12543.

It is an arithmetic number, because the mean of its divisors is an integer number (1785028).

Almost surely, 2^18274151 is an apocalyptic number.

18274151 is a deficient number, since it is larger than the sum of its proper divisors (3146185).

18274151 is an equidigital number, since it uses as much as digits as its factorization.

With its successor (18274152) it forms a Ruth-Aaron pair, since the sum of their prime factors is the same (1642).

18274151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1642 (or 1601 counting only the distinct ones).

The product of its digits is 2240, while the sum is 29.

The square root of 18274151 is about 4274.8275988629. The cubic root of 18274151 is about 263.3979575767.

The spelling of 18274151 in words is "eighteen million, two hundred seventy-four thousand, one hundred fifty-one".