2129890818 has 16 divisors (see below), whose sum is σ = 4647034656. Its totient is φ = 645421440.

The previous prime is 2129890793. The next prime is 2129890843. The reversal of 2129890818 is 8180989212.

It is an interprime number because it is at equal distance from previous prime (2129890793) and next prime (2129890843).

It is a super-3 number, since 3×2129890818³ (a number of 29 digits) contains 333 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16135471 + ... + 16135602.

It is an arithmetic number, because the mean of its divisors is an integer number (290439666).

Almost surely, 2^2129890818 is an apocalyptic number.

2129890818 is an abundant number, since it is smaller than the sum of its proper divisors (2517143838).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2129890818 is a wasteful number, since it uses less digits than its factorization.

2129890818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32271089.

The product of its (nonzero) digits is 165888, while the sum is 48.

The square root of 2129890818 is about 46150.7401674123. The cubic root of 2129890818 is about 1286.6263666790.

The spelling of 2129890818 in words is "two billion, one hundred twenty-nine million, eight hundred ninety thousand, eight hundred eighteen".