13420807431 has 4 divisors (see below), whose sum is σ = 17894409912. Its totient is φ = 8947204952.

The previous prime is 13420807409. The next prime is 13420807451. The reversal of 13420807431 is 13470802431.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13420807431 - 2²⁵ = 13387252999 is a prime.

It is a super-3 number, since 3×13420807431³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 13420807392 and 13420807401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13420807451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2236801236 + ... + 2236801241.

It is an arithmetic number, because the mean of its divisors is an integer number (4473602478).

Almost surely, 2^13420807431 is an apocalyptic number.

13420807431 is a deficient number, since it is larger than the sum of its proper divisors (4473602481).

13420807431 is an equidigital number, since it uses as much as digits as its factorization.

13420807431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4473602480.

The product of its (nonzero) digits is 16128, while the sum is 33.

Subtracting 13420807431 from its reverse (13470802431), we obtain a triangular number (49995000 = T₉₉₉₉).

The spelling of 13420807431 in words is "thirteen billion, four hundred twenty million, eight hundred seven thousand, four hundred thirty-one".