13421210440 has 64 divisors (see below), whose sum is σ = 34078968000. Its totient is φ = 4712144640.

The previous prime is 13421210431. The next prime is 13421210441. The reversal of 13421210440 is 4401212431.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (13421210441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 513150 + ... + 538669.

It is an arithmetic number, because the mean of its divisors is an integer number (532483875).

Almost surely, 2^13421210440 is an apocalyptic number.

13421210440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13421210440 is an abundant number, since it is smaller than the sum of its proper divisors (20657757560).

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

13421210440 is a wasteful number, since it uses less digits than its factorization.

13421210440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1051870 (or 1051866 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 13421210440 its reverse (4401212431), we get a palindrome (17822422871).

The spelling of 13421210440 in words is "thirteen billion, four hundred twenty-one million, two hundred ten thousand, four hundred forty".