23418340 has 36 divisors (see below), whose sum is σ = 54061308. Its totient is φ = 8514880.

The previous prime is 23418331. The next prime is 23418377. The reversal of 23418340 is 4381432.

It can be written as a sum of positive squares in 2 ways, for example, as 12236004 + 11182336 = 3498^2 + 3344^2 .

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 2419 + ... + 7258.

It is an arithmetic number, because the mean of its divisors is an integer number (1501703).

Almost surely, 2^23418340 is an apocalyptic number.

23418340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

23418340 is the 2420-th decagonal number.

It is an amenable number.

23418340 is an abundant number, since it is smaller than the sum of its proper divisors (30642968).

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

23418340 is a wasteful number, since it uses less digits than its factorization.

23418340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9708 (or 9695 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 23418340 is about 4839.2499418815. The cubic root of 23418340 is about 286.1005563567.

Adding to 23418340 its reverse (4381432), we get a palindrome (27799772).

The spelling of 23418340 in words is "twenty-three million, four hundred eighteen thousand, three hundred forty".