13664020220 has 12 divisors (see below), whose sum is σ = 28694442504. Its totient is φ = 5465608080.

The previous prime is 13664020187. The next prime is 13664020241. The reversal of 13664020220 is 2202046631.

It is a self number, because there is not a number n which added to its sum of digits gives 13664020220.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 341600486 + ... + 341600525.

It is an arithmetic number, because the mean of its divisors is an integer number (2391203542).

Almost surely, 2^13664020220 is an apocalyptic number.

13664020220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13664020220 is an abundant number, since it is smaller than the sum of its proper divisors (15030422284).

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

13664020220 is a wasteful number, since it uses less digits than its factorization.

13664020220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 683201020 (or 683201018 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 13664020220 its reverse (2202046631), we get a palindrome (15866066851).

The spelling of 13664020220 in words is "thirteen billion, six hundred sixty-four million, twenty thousand, two hundred twenty".