18070281 has 12 divisors (see below), whose sum is σ = 26470080. Its totient is φ = 11876760.

The previous prime is 18070259. The next prime is 18070301. The reversal of 18070281 is 18207081.

It is not a de Polignac number, because 18070281 - 2⁷ = 18070153 is a prime.

It is a super-2 number, since 2×18070281² = 653070110837922, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18070081) 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, 13501 + ... + 14778.

It is an arithmetic number, because the mean of its divisors is an integer number (2205840).

Almost surely, 2^18070281 is an apocalyptic number.

It is an amenable number.

18070281 is a deficient number, since it is larger than the sum of its proper divisors (8399799).

18070281 is a wasteful number, since it uses less digits than its factorization.

18070281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28356 (or 28353 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 27.

The square root of 18070281 is about 4250.9153132002. The cubic root of 18070281 is about 262.4147859458.

The spelling of 18070281 in words is "eighteen million, seventy thousand, two hundred eighty-one".