2123400618 has 24 divisors (see below), whose sum is σ = 4800732768. Its totient is φ = 677026152.

The previous prime is 2123400607. The next prime is 2123400661. The reversal of 2123400618 is 8160043212.

2123400618 is a `hidden beast` number, since 2 + 1 + 2 + 3 + 40 + 0 + 618 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 2123400591 and 2123400600.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2564080 + ... + 2564907.

It is an arithmetic number, because the mean of its divisors is an integer number (200030532).

Almost surely, 2^2123400618 is an apocalyptic number.

2123400618 is an abundant number, since it is smaller than the sum of its proper divisors (2677332150).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2123400618 is a wasteful number, since it uses less digits than its factorization.

2123400618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5129018 (or 5129015 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 2123400618 is about 46080.3712875667. The cubic root of 2123400618 is about 1285.3181683744.

The spelling of 2123400618 in words is "two billion, one hundred twenty-three million, four hundred thousand, six hundred eighteen".