23356403440 has 40 divisors (see below), whose sum is σ = 54460197360. Its totient is φ = 9315626496.

The previous prime is 23356403437. The next prime is 23356403471. The reversal of 23356403440 is 4430465332.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 23356403396 and 23356403405.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 392925 + ... + 448444.

It is an arithmetic number, because the mean of its divisors is an integer number (1361504934).

Almost surely, 2^23356403440 is an apocalyptic number.

23356403440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23356403440 is an abundant number, since it is smaller than the sum of its proper divisors (31103793920).

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

23356403440 is a wasteful number, since it uses less digits than its factorization.

23356403440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 841729 (or 841723 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 34.

Adding to 23356403440 its reverse (4430465332), we get a palindrome (27786868772).

The spelling of 23356403440 in words is "twenty-three billion, three hundred fifty-six million, four hundred three thousand, four hundred forty".