2153959018 has 8 divisors (see below), whose sum is σ = 3233425860. Its totient is φ = 1076150400.

The previous prime is 2153959013. The next prime is 2153959037. The reversal of 2153959018 is 8109593512.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1949840649 + 204118369 = 44157^2 + 14287^2 .

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

It is not an unprimeable number, because it can be changed into a prime (2153959013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 411303 + ... + 416506.

Almost surely, 2^2153959018 is an apocalyptic number.

2153959018 is a deficient number, since it is larger than the sum of its proper divisors (1079466842).

2153959018 is a wasteful number, since it uses less digits than its factorization.

2153959018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 829112.

The product of its (nonzero) digits is 97200, while the sum is 43.

The square root of 2153959018 is about 46410.7640316339. The cubic root of 2153959018 is about 1291.4546053881.

The spelling of 2153959018 in words is "two billion, one hundred fifty-three million, nine hundred fifty-nine thousand, eighteen".