2118929401 has 4 divisors (see below), whose sum is σ = 2140774132. Its totient is φ = 2097084672.

The previous prime is 2118929387. The next prime is 2118929411. The reversal of 2118929401 is 1049298112.

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

It can be written as a sum of positive squares in 2 ways, for example, as 444155625 + 1674773776 = 21075^2 + 40924^2 .

It is a cyclic number.

It is not a de Polignac number, because 2118929401 - 2¹¹ = 2118927353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2118929411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10922220 + ... + 10922413.

It is an arithmetic number, because the mean of its divisors is an integer number (535193533).

Almost surely, 2^2118929401 is an apocalyptic number.

It is an amenable number.

2118929401 is a deficient number, since it is larger than the sum of its proper divisors (21844731).

2118929401 is an equidigital number, since it uses as much as digits as its factorization.

2118929401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21844730.

The product of its (nonzero) digits is 10368, while the sum is 37.

The square root of 2118929401 is about 46031.8303025200. The cubic root of 2118929401 is about 1284.4153751738.

The spelling of 2118929401 in words is "two billion, one hundred eighteen million, nine hundred twenty-nine thousand, four hundred one".