18070533 has 30 divisors (see below), whose sum is σ = 29294342. Its totient is φ = 11035440.

The previous prime is 18070529. The next prime is 18070553. The reversal of 18070533 is 33507081.

It can be written as a sum of positive squares in only one way, i.e., 12510369 + 5560164 = 3537^2 + 2358^2 .

It is not a de Polignac number, because 18070533 - 2² = 18070529 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 18070497 and 18070506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18070523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 137878 + ... + 138008.

Almost surely, 2^18070533 is an apocalyptic number.

18070533 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

18070533 is a deficient number, since it is larger than the sum of its proper divisors (11223809).

18070533 is an equidigital number, since it uses as much as digits as its factorization.

18070533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287 (or 147 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 18070533 is about 4250.9449537720. The cubic root of 18070533 is about 262.4160057796.

The spelling of 18070533 in words is "eighteen million, seventy thousand, five hundred thirty-three".