18010613 has 4 divisors (see below), whose sum is σ = 18958560. Its totient is φ = 17062668.

The previous prime is 18010609. The next prime is 18010627. The reversal of 18010613 is 31601081.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31601081 = 1889 ⋅16729.

It is a cyclic number.

It is not a de Polignac number, because 18010613 - 2² = 18010609 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18010693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 473945 + ... + 473982.

It is an arithmetic number, because the mean of its divisors is an integer number (4739640).

Almost surely, 2^18010613 is an apocalyptic number.

It is an amenable number.

18010613 is a deficient number, since it is larger than the sum of its proper divisors (947947).

18010613 is an equidigital number, since it uses as much as digits as its factorization.

18010613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 947946.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 18010613 is about 4243.8912568538. The cubic root of 18010613 is about 262.1256365760.

Adding to 18010613 its reverse (31601081), we get a palindrome (49611694).

The spelling of 18010613 in words is "eighteen million, ten thousand, six hundred thirteen".