23404133440 has 28 divisors (see below), whose sum is σ = 55731093516. Its totient is φ = 9361653248.

The previous prime is 23404133383. The next prime is 23404133453. The reversal of 23404133440 is 4433140432.

It can be written as a sum of positive squares in 2 ways, for example, as 16202234944 + 7201898496 = 127288^2 + 84864^2 .

It is a junction number, because it is equal to n+sod(n) for n = 23404133399 and 23404133408.

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 3 ways as a sum of consecutive naturals, for example, 36568639 + ... + 36569278.

It is an arithmetic number, because the mean of its divisors is an integer number (1990396197).

Almost surely, 2^23404133440 is an apocalyptic number.

23404133440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23404133440 is an abundant number, since it is smaller than the sum of its proper divisors (32326960076).

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

23404133440 is an equidigital number, since it uses as much as digits as its factorization.

23404133440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73137934 (or 73137924 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 23404133440 its reverse (4433140432), we get a palindrome (27837273872).

The spelling of 23404133440 in words is "twenty-three billion, four hundred four million, one hundred thirty-three thousand, four hundred forty".