13220505326 has 16 divisors (see below), whose sum is σ = 23445231840. Its totient is φ = 5470553760.

The previous prime is 13220505289. The next prime is 13220505329. The reversal of 13220505326 is 62350502231.

It is a super-2 number, since 2×13220505326² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13220505329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16281005 + ... + 16281816.

It is an arithmetic number, because the mean of its divisors is an integer number (1465326990).

Almost surely, 2^13220505326 is an apocalyptic number.

13220505326 is a deficient number, since it is larger than the sum of its proper divisors (10224726514).

13220505326 is a wasteful number, since it uses less digits than its factorization.

13220505326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32562859.

The product of its (nonzero) digits is 10800, while the sum is 29.

The spelling of 13220505326 in words is "thirteen billion, two hundred twenty million, five hundred five thousand, three hundred twenty-six".