1918190910211 has 8 divisors (see below), whose sum is σ = 1930939398144. Its totient is φ = 1905443017800.

The previous prime is 1918190910187. The next prime is 1918190910217. The reversal of 1918190910211 is 1120190918191.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1918190910211 - 2²⁷ = 1918056692483 is a prime.

It is a super-2 number, since 2×1918190910211² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1918190910217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7675716 + ... + 7921678.

It is an arithmetic number, because the mean of its divisors is an integer number (241367424768).

Almost surely, 2^{1918190910211} is an apocalyptic number.

1918190910211 is a deficient number, since it is larger than the sum of its proper divisors (12748487933).

1918190910211 is a wasteful number, since it uses less digits than its factorization.

1918190910211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297761.

The product of its (nonzero) digits is 11664, while the sum is 43.

The spelling of 1918190910211 in words is "one trillion, nine hundred eighteen billion, one hundred ninety million, nine hundred ten thousand, two hundred eleven".