13420132403440 has 80 divisors (see below), whose sum is σ = 35659672634880. Its totient is φ = 4601128423680.

The previous prime is 13420132403413. The next prime is 13420132403449. The reversal of 13420132403440 is 4430423102431.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13420132403449) 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, 77293525 + ... + 77466955.

It is an arithmetic number, because the mean of its divisors is an integer number (445745907936).

Almost surely, 2^{13420132403440} is an apocalyptic number.

13420132403440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13420132403440 is an abundant number, since it is smaller than the sum of its proper divisors (22239540231440).

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

13420132403440 is a wasteful number, since it uses less digits than its factorization.

13420132403440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311630 (or 311624 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 31.

Adding to 13420132403440 its reverse (4430423102431), we get a palindrome (17850555505871).

The spelling of 13420132403440 in words is "thirteen trillion, four hundred twenty billion, one hundred thirty-two million, four hundred three thousand, four hundred forty".