23403473640 has 256 divisors, whose sum is σ = 83259187200. Its totient is φ = 5826981888.

The previous prime is 23403473633. The next prime is 23403473651. The reversal of 23403473640 is 4637430432.

23403473640 is a `hidden beast` number, since 2 + 3 + 4 + 0 + 3 + 4 + 7 + 3 + 640 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 23403473595 and 23403473604.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2326702 + ... + 2336738.

It is an arithmetic number, because the mean of its divisors is an integer number (325231200).

Almost surely, 2^23403473640 is an apocalyptic number.

23403473640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23403473640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41629593600).

23403473640 is an abundant number, since it is smaller than the sum of its proper divisors (59855713560).

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

23403473640 is a wasteful number, since it uses less digits than its factorization.

23403473640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10201 (or 10191 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 36.

The spelling of 23403473640 in words is "twenty-three billion, four hundred three million, four hundred seventy-three thousand, six hundred forty".