13011620 has 12 divisors (see below), whose sum is σ = 27324444. Its totient is φ = 5204640.

The previous prime is 13011619. The next prime is 13011623. The reversal of 13011620 is 2611031.

It can be written as a sum of positive squares in 2 ways, for example, as 3076516 + 9935104 = 1754^2 + 3152^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13011595 and 13011604.

It is not an unprimeable number, because it can be changed into a prime (13011623) 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, 325271 + ... + 325310.

It is an arithmetic number, because the mean of its divisors is an integer number (2277037).

Almost surely, 2^13011620 is an apocalyptic number.

13011620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13011620 is an abundant number, since it is smaller than the sum of its proper divisors (14312824).

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

13011620 is a wasteful number, since it uses less digits than its factorization.

13011620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 650590 (or 650588 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 13011620 is about 3607.1623196080. The cubic root of 13011620 is about 235.2035056244.

Adding to 13011620 its reverse (2611031), we get a palindrome (15622651).

It can be divided in two parts, 13011 and 620, that added together give a palindrome (13631).

The spelling of 13011620 in words is "thirteen million, eleven thousand, six hundred twenty".