2159020906 has 8 divisors (see below), whose sum is σ = 3701178720. Its totient is φ = 925294668.

The previous prime is 2159020891. The next prime is 2159020907. The reversal of 2159020906 is 6090209512.

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

It is a super-2 number, since 2×2159020906² = 9322742545090121672, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2159020907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77107876 + ... + 77107903.

It is an arithmetic number, because the mean of its divisors is an integer number (462647340).

Almost surely, 2^2159020906 is an apocalyptic number.

2159020906 is a deficient number, since it is larger than the sum of its proper divisors (1542157814).

2159020906 is a wasteful number, since it uses less digits than its factorization.

2159020906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154215788.

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 2159020906 is about 46465.2655862419. The cubic root of 2159020906 is about 1292.4654702342.

The spelling of 2159020906 in words is "two billion, one hundred fifty-nine million, twenty thousand, nine hundred six".