2149718021 has 8 divisors (see below), whose sum is σ = 2359191744. Its totient is φ = 1942585120.

The previous prime is 2149718009. The next prime is 2149718029. The reversal of 2149718021 is 1208179412.

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 2149718021 - 2⁶ = 2149717957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2149718029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 583280 + ... + 586953.

It is an arithmetic number, because the mean of its divisors is an integer number (294898968).

Almost surely, 2^2149718021 is an apocalyptic number.

It is an amenable number.

2149718021 is a deficient number, since it is larger than the sum of its proper divisors (209473723).

2149718021 is a wasteful number, since it uses less digits than its factorization.

2149718021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1170411.

The product of its (nonzero) digits is 8064, while the sum is 35.

The square root of 2149718021 is about 46365.0517200186. The cubic root of 2149718021 is about 1290.6064534275.

The spelling of 2149718021 in words is "two billion, one hundred forty-nine million, seven hundred eighteen thousand, twenty-one".