18705305001 has 16 divisors (see below), whose sum is σ = 25144915968. Its totient is φ = 12368112000.

The previous prime is 18705304979. The next prime is 18705305023. The reversal of 18705305001 is 10050350781.

It is an interprime number because it is at equal distance from previous prime (18705304979) and next prime (18705305023).

It is not a de Polignac number, because 18705305001 - 2⁷ = 18705304873 is a prime.

It is a super-2 number, since 2×18705305001² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18705305001.

It is not an unprimeable number, because it can be changed into a prime (18705305081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 453291 + ... + 492831.

It is an arithmetic number, because the mean of its divisors is an integer number (1571557248).

Almost surely, 2^18705305001 is an apocalyptic number.

It is an amenable number.

18705305001 is a deficient number, since it is larger than the sum of its proper divisors (6439610967).

18705305001 is a wasteful number, since it uses less digits than its factorization.

18705305001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40832.

The product of its (nonzero) digits is 4200, while the sum is 30.

Adding to 18705305001 its reverse (10050350781), we get a palindrome (28755655782).

The spelling of 18705305001 in words is "eighteen billion, seven hundred five million, three hundred five thousand, one".