13011020660 has 24 divisors (see below), whose sum is σ = 29807066016. Its totient is φ = 4731280160.

The previous prime is 13011020653. The next prime is 13011020677. The reversal of 13011020660 is 6602011031.

It is a super-2 number, since 2×13011020660² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29570282 + ... + 29570721.

It is an arithmetic number, because the mean of its divisors is an integer number (1241961084).

Almost surely, 2^13011020660 is an apocalyptic number.

13011020660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13011020660 is an abundant number, since it is smaller than the sum of its proper divisors (16796045356).

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

13011020660 is a wasteful number, since it uses less digits than its factorization.

13011020660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59141023 (or 59141021 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 13011020660 its reverse (6602011031), we get a palindrome (19613031691).

The spelling of 13011020660 in words is "thirteen billion, eleven million, twenty thousand, six hundred sixty".