18741001 has 2 divisors, whose sum is σ = 18741002. Its totient is φ = 18741000.

The previous prime is 18740999. The next prime is 18741007. The reversal of 18741001 is 10014781.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18490000 + 251001 = 4300^2 + 501^2 .

It is a cyclic number.

It is not a de Polignac number, because 18741001 - 2¹ = 18740999 is a prime.

Together with 18740999, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18741007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9370500 + 9370501.

It is an arithmetic number, because the mean of its divisors is an integer number (9370501).

Almost surely, 2^18741001 is an apocalyptic number.

It is an amenable number.

18741001 is a deficient number, since it is larger than the sum of its proper divisors (1).

18741001 is an equidigital number, since it uses as much as digits as its factorization.

18741001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 224, while the sum is 22.

The square root of 18741001 is about 4329.0877791978. The cubic root of 18741001 is about 265.6221338745.

Adding to 18741001 its reverse (10014781), we get a palindrome (28755782).

The spelling of 18741001 in words is "eighteen million, seven hundred forty-one thousand, one".