23403404240 has 20 divisors (see below), whose sum is σ = 54412915044. Its totient is φ = 9361361664.

The previous prime is 23403404239. The next prime is 23403404257. The reversal of 23403404240 is 4240430432.

It can be written as a sum of positive squares in 2 ways, for example, as 2830665616 + 20572738624 = 53204^2 + 143432^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146271197 + ... + 146271356.

Almost surely, 2^23403404240 is an apocalyptic number.

23403404240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23403404240 is an abundant number, since it is smaller than the sum of its proper divisors (31009510804).

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

23403404240 is a wasteful number, since it uses less digits than its factorization.

23403404240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292542566 (or 292542560 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 26.

Adding to 23403404240 its reverse (4240430432), we get a palindrome (27643834672).

The spelling of 23403404240 in words is "twenty-three billion, four hundred three million, four hundred four thousand, two hundred forty".