13220661443 has 8 divisors (see below), whose sum is σ = 14729402880. Its totient is φ = 11763063880.

The previous prime is 13220661407. The next prime is 13220661451. The reversal of 13220661443 is 34416602231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13220661443 - 2¹⁴ = 13220645059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13220661403) 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, 12785423 + ... + 12786456.

It is an arithmetic number, because the mean of its divisors is an integer number (1841175360).

Almost surely, 2^13220661443 is an apocalyptic number.

13220661443 is a deficient number, since it is larger than the sum of its proper divisors (1508741437).

13220661443 is a wasteful number, since it uses less digits than its factorization.

13220661443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25571937.

The product of its (nonzero) digits is 20736, while the sum is 32.

The spelling of 13220661443 in words is "thirteen billion, two hundred twenty million, six hundred sixty-one thousand, four hundred forty-three".