2091918128833 has 16 divisors (see below), whose sum is σ = 2262285950400. Its totient is φ = 1922909459904.

The previous prime is 2091918128821. The next prime is 2091918128849. The reversal of 2091918128833 is 3388218191902.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2091918128833 - 2²⁵ = 2091884574401 is a prime.

It is a super-2 number, since 2×2091918128833² (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 (2091918120833) 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, 5416443 + ... + 5789791.

It is an arithmetic number, because the mean of its divisors is an integer number (141392871900).

Almost surely, 2^{2091918128833} is an apocalyptic number.

It is an amenable number.

2091918128833 is a deficient number, since it is larger than the sum of its proper divisors (170367821567).

2091918128833 is a wasteful number, since it uses less digits than its factorization.

2091918128833 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375168.

The product of its (nonzero) digits is 1492992, while the sum is 55.

The spelling of 2091918128833 in words is "two trillion, ninety-one billion, nine hundred eighteen million, one hundred twenty-eight thousand, eight hundred thirty-three".