13605219992 has 128 divisors (see below), whose sum is σ = 33382056960. Its totient is φ = 5050805760.

The previous prime is 13605219983. The next prime is 13605219997. The reversal of 13605219992 is 29991250631.

It is a super-2 number, since 2×13605219992² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13605219997) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 879767 + ... + 895097.

It is an arithmetic number, because the mean of its divisors is an integer number (260797320).

Almost surely, 2^13605219992 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13605219992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16691028480).

13605219992 is an abundant number, since it is smaller than the sum of its proper divisors (19776836968).

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

13605219992 is a wasteful number, since it uses less digits than its factorization.

13605219992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15433 (or 15429 counting only the distinct ones).

The product of its (nonzero) digits is 262440, while the sum is 47.

The spelling of 13605219992 in words is "thirteen billion, six hundred five million, two hundred nineteen thousand, nine hundred ninety-two".