13131020 has 36 divisors (see below), whose sum is σ = 32079600. Its totient is φ = 4501728.

The previous prime is 13131017. The next prime is 13131023. The reversal of 13131020 is 2013131.

It is an interprime number because it is at equal distance from previous prime (13131017) and next prime (13131023).

It is a junction number, because it is equal to n+sod(n) for n = 13130992 and 13131010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13131023) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5720 + ... + 7679.

It is an arithmetic number, because the mean of its divisors is an integer number (891100).

Almost surely, 2^13131020 is an apocalyptic number.

13131020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13131020 is an abundant number, since it is smaller than the sum of its proper divisors (18948580).

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

13131020 is a wasteful number, since it uses less digits than its factorization.

13131020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13422 (or 13413 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 13131020 is about 3623.6749302331. The cubic root of 13131020 is about 235.9207576530.

Adding to 13131020 its reverse (2013131), we get a palindrome (15144151).

The spelling of 13131020 in words is "thirteen million, one hundred thirty-one thousand, twenty".