23040004040 has 32 divisors (see below), whose sum is σ = 52126434360. Its totient is φ = 9165081600.

The previous prime is 23040004027. The next prime is 23040004049. The reversal of 23040004040 is 4040004032.

It can be written as a sum of positive squares in 4 ways, for example, as 10348179076 + 12691824964 = 101726^2 + 112658^2 .

It is not an unprimeable number, because it can be changed into a prime (23040004049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1583921 + ... + 1598400.

Almost surely, 2^23040004040 is an apocalyptic number.

23040004040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23040004040 is an abundant number, since it is smaller than the sum of its proper divisors (29086430320).

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

23040004040 is a wasteful number, since it uses less digits than its factorization.

23040004040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3182513 (or 3182509 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 17.

Adding to 23040004040 its reverse (4040004032), we get a palindrome (27080008072).

The spelling of 23040004040 in words is "twenty-three billion, forty million, four thousand, forty".