2123987618 has 8 divisors (see below), whose sum is σ = 3353664720. Its totient is φ = 1006099380.

The previous prime is 2123987603. The next prime is 2123987629. The reversal of 2123987618 is 8167893212.

It is a happy number.

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

It is a super-2 number, since 2×2123987618² = 9022646802834627848, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27947168 + ... + 27947243.

It is an arithmetic number, because the mean of its divisors is an integer number (419208090).

Almost surely, 2^2123987618 is an apocalyptic number.

2123987618 is a deficient number, since it is larger than the sum of its proper divisors (1229677102).

2123987618 is a wasteful number, since it uses less digits than its factorization.

2123987618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55894432.

The product of its digits is 290304, while the sum is 47.

The square root of 2123987618 is about 46086.7401537579. The cubic root of 2123987618 is about 1285.4365966862.

The spelling of 2123987618 in words is "two billion, one hundred twenty-three million, nine hundred eighty-seven thousand, six hundred eighteen".