18010501 has 2 divisors, whose sum is σ = 18010502. Its totient is φ = 18010500.

The previous prime is 18010483. The next prime is 18010547. The reversal of 18010501 is 10501081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10176100 + 7834401 = 3190^2 + 2799^2 .

It is a cyclic number.

It is not a de Polignac number, because 18010501 - 2⁷ = 18010373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18010571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9005250 + 9005251.

It is an arithmetic number, because the mean of its divisors is an integer number (9005251).

Almost surely, 2^18010501 is an apocalyptic number.

It is an amenable number.

18010501 is a deficient number, since it is larger than the sum of its proper divisors (1).

18010501 is an equidigital number, since it uses as much as digits as its factorization.

18010501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40, while the sum is 16.

The square root of 18010501 is about 4243.8780613962. The cubic root of 18010501 is about 262.1250932272.

Adding to 18010501 its reverse (10501081), we get a palindrome (28511582).

The spelling of 18010501 in words is "eighteen million, ten thousand, five hundred one".