2406321918 has 480 divisors, whose sum is σ = 7786437120. Its totient is φ = 538876800.

The previous prime is 2406321913. The next prime is 2406321923. The reversal of 2406321918 is 8191236042.

2406321918 is a `hidden beast` number, since 2 + 4 + 0 + 632 + 1 + 9 + 18 = 666.

It is an interprime number because it is at equal distance from previous prime (2406321913) and next prime (2406321923).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2406321913) by changing a digit.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 33891823 + ... + 33891893.

It is an arithmetic number, because the mean of its divisors is an integer number (16221744).

Almost surely, 2^2406321918 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2406321918, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3893218560).

2406321918 is an abundant number, since it is smaller than the sum of its proper divisors (5380115202).

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

2406321918 is a wasteful number, since it uses less digits than its factorization.

2406321918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146 (or 126 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 2406321918 is about 49054.2752265284. The cubic root of 2406321918 is about 1340.0404528517.

The spelling of 2406321918 in words is "two billion, four hundred six million, three hundred twenty-one thousand, nine hundred eighteen".