13020220445 has 4 divisors (see below), whose sum is σ = 15624264540. Its totient is φ = 10416176352.

The previous prime is 13020220429. The next prime is 13020220471. The reversal of 13020220445 is 54402202031.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4709527876 + 8310692569 = 68626^2 + 91163^2 .

It is a cyclic number.

It is not a de Polignac number, because 13020220445 - 2⁴ = 13020220429 is a prime.

It is a super-2 number, since 2×13020220445² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 13020220445.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1302022040 + ... + 1302022049.

It is an arithmetic number, because the mean of its divisors is an integer number (3906066135).

Almost surely, 2^13020220445 is an apocalyptic number.

It is an amenable number.

13020220445 is a deficient number, since it is larger than the sum of its proper divisors (2604044095).

13020220445 is an equidigital number, since it uses as much as digits as its factorization.

13020220445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2604044094.

The product of its (nonzero) digits is 1920, while the sum is 23.

Adding to 13020220445 its reverse (54402202031), we get a palindrome (67422422476).

The spelling of 13020220445 in words is "thirteen billion, twenty million, two hundred twenty thousand, four hundred forty-five".