13020660 has 36 divisors (see below), whose sum is σ = 39496548. Its totient is φ = 3472128.

The previous prime is 13020659. The next prime is 13020671. The reversal of 13020660 is 6602031.

It is a happy number.

13020660 is a `hidden beast` number, since 1 + 3 + 0 + 2 + 0 + 660 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 4235364 + 8785296 = 2058^2 + 2964^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35989 + ... + 36348.

Almost surely, 2^13020660 is an apocalyptic number.

13020660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13020660 is an abundant number, since it is smaller than the sum of its proper divisors (26475888).

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

13020660 is a wasteful number, since it uses less digits than its factorization.

13020660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72352 (or 72347 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 13020660 is about 3608.4151645840. The cubic root of 13020660 is about 235.2579632930.

Adding to 13020660 its reverse (6602031), we get a palindrome (19622691).

The spelling of 13020660 in words is "thirteen million, twenty thousand, six hundred sixty".