1918190001001 has 4 divisors (see below), whose sum is σ = 1918264545604. Its totient is φ = 1918115456400.

The previous prime is 1918190000959. The next prime is 1918190001043. The reversal of 1918190001001 is 1001000918191.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1918190000959) and next prime (1918190001043).

It can be written as a sum of positive squares in 2 ways, for example, as 1676892912601 + 241297088400 = 1294949^2 + 491220^2 .

It is a cyclic number.

It is not a de Polignac number, because 1918190001001 - 2¹⁷ = 1918189869929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1918194001001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37233690 + ... + 37285171.

It is an arithmetic number, because the mean of its divisors is an integer number (479566136401).

Almost surely, 2^{1918190001001} is an apocalyptic number.

It is an amenable number.

1918190001001 is a deficient number, since it is larger than the sum of its proper divisors (74544603).

1918190001001 is an equidigital number, since it uses as much as digits as its factorization.

1918190001001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74544602.

The product of its (nonzero) digits is 648, while the sum is 31.

Adding to 1918190001001 its reverse (1001000918191), we get a palindrome (2919190919192).

The spelling of 1918190001001 in words is "one trillion, nine hundred eighteen billion, one hundred ninety million, one thousand, one".