13031620 has 24 divisors (see below), whose sum is σ = 31276224. Its totient is φ = 4467936.

The previous prime is 13031617. The next prime is 13031621. The reversal of 13031620 is 2613031.

It is a zygodrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 13031594 and 13031603.

It is not an unprimeable number, because it can be changed into a prime (13031621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46402 + ... + 46681.

It is an arithmetic number, because the mean of its divisors is an integer number (1303176).

Almost surely, 2^13031620 is an apocalyptic number.

13031620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13031620 is an abundant number, since it is smaller than the sum of its proper divisors (18244604).

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

13031620 is a wasteful number, since it uses less digits than its factorization.

13031620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93099 (or 93097 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 13031620 is about 3609.9335173934. The cubic root of 13031620 is about 235.3239533980.

Adding to 13031620 its reverse (2613031), we get a palindrome (15644651).

The spelling of 13031620 in words is "thirteen million, thirty-one thousand, six hundred twenty".