13320450405 has 40 divisors (see below), whose sum is σ = 24052533912. Its totient is φ = 7052355072.

The previous prime is 13320450389. The next prime is 13320450421. The reversal of 13320450405 is 50405402331.

13320450405 is a `hidden beast` number, since 1 + 3 + 3 + 204 + 50 + 405 = 666.

It is an interprime number because it is at equal distance from previous prime (13320450389) and next prime (13320450421).

It can be written as a sum of positive squares in 4 ways, for example, as 3378166884 + 9942283521 = 58122^2 + 99711^2 .

It is not a de Polignac number, because 13320450405 - 2⁴ = 13320450389 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 64552 + ... + 175521.

Almost surely, 2^13320450405 is an apocalyptic number.

13320450405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13320450405 is a deficient number, since it is larger than the sum of its proper divisors (10732083507).

13320450405 is a wasteful number, since it uses less digits than its factorization.

13320450405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240227 (or 240218 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

Adding to 13320450405 its reverse (50405402331), we get a palindrome (63725852736).

The spelling of 13320450405 in words is "thirteen billion, three hundred twenty million, four hundred fifty thousand, four hundred five".