13440420312 has 32 divisors (see below), whose sum is σ = 36655692480. Its totient is φ = 4072854560.

The previous prime is 13440420307. The next prime is 13440420341. The reversal of 13440420312 is 21302404431.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25455078 + ... + 25455605.

It is an arithmetic number, because the mean of its divisors is an integer number (1145490390).

Almost surely, 2^13440420312 is an apocalyptic number.

13440420312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13440420312 is an abundant number, since it is smaller than the sum of its proper divisors (23215272168).

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

13440420312 is a wasteful number, since it uses less digits than its factorization.

13440420312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50910703 (or 50910699 counting only the distinct ones).

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

Adding to 13440420312 its reverse (21302404431), we get a palindrome (34742824743).

The spelling of 13440420312 in words is "thirteen billion, four hundred forty million, four hundred twenty thousand, three hundred twelve".