13420431 has 16 divisors (see below), whose sum is σ = 20747520. Its totient is φ = 8557560.

The previous prime is 13420397. The next prime is 13420453. The reversal of 13420431 is 13402431.

It is not a de Polignac number, because 13420431 - 2¹⁴ = 13404047 is a prime.

It is a super-2 number, since 2×13420431² = 360215936451522, which contains 22 as substring.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13420481) 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, 10185 + ... + 11426.

It is an arithmetic number, because the mean of its divisors is an integer number (1296720).

Almost surely, 2^13420431 is an apocalyptic number.

13420431 is a deficient number, since it is larger than the sum of its proper divisors (7327089).

13420431 is a wasteful number, since it uses less digits than its factorization.

13420431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21643 (or 21637 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 13420431 is about 3663.3906425605. The cubic root of 13420431 is about 237.6414285988.

Adding to 13420431 its reverse (13402431), we get a palindrome (26822862).

The spelling of 13420431 in words is "thirteen million, four hundred twenty thousand, four hundred thirty-one".