13402040242420 has 24 divisors (see below), whose sum is σ = 28167875744904. Its totient is φ = 5356322528256.

The previous prime is 13402040242417. The next prime is 13402040242441. The reversal of 13402040242420 is 2424204020431.

It can be written as a sum of positive squares in 4 ways, for example, as 5597179978896 + 7804860263524 = 2365836^2 + 2793718^2 .

It is a super-2 number, since 2×13402040242420² (a number of 27 digits) contains 22 as substring.

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, 280823589 + ... + 280871308.

It is an arithmetic number, because the mean of its divisors is an integer number (1173661489371).

Almost surely, 2^{13402040242420} is an apocalyptic number.

13402040242420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13402040242420 is an abundant number, since it is smaller than the sum of its proper divisors (14765835502484).

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

13402040242420 is a wasteful number, since it uses less digits than its factorization.

13402040242420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561696099 (or 561696097 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 28.

Adding to 13402040242420 its reverse (2424204020431), we get a palindrome (15826244262851).

The spelling of 13402040242420 in words is "thirteen trillion, four hundred two billion, forty million, two hundred forty-two thousand, four hundred twenty".