13240140423 has 8 divisors (see below), whose sum is σ = 17656667136. Its totient is φ = 8825187000.

The previous prime is 13240140409. The next prime is 13240140427. The reversal of 13240140423 is 32404104231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13240140423 - 2⁵ = 13240140391 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13240140393 and 13240140402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13240140427) 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, 373543 + ... + 407448.

It is an arithmetic number, because the mean of its divisors is an integer number (2207083392).

Almost surely, 2^13240140423 is an apocalyptic number.

13240140423 is a deficient number, since it is larger than the sum of its proper divisors (4416526713).

13240140423 is an equidigital number, since it uses as much as digits as its factorization.

13240140423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 786645.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 13240140423 its reverse (32404104231), we get a palindrome (45644244654).

The spelling of 13240140423 in words is "thirteen billion, two hundred forty million, one hundred forty thousand, four hundred twenty-three".