13333778320 has 20 divisors (see below), whose sum is σ = 31001034780. Its totient is φ = 5333511296.

The previous prime is 13333778239. The next prime is 13333778347. The reversal of 13333778320 is 2387733331.

It can be written as a sum of positive squares in 2 ways, for example, as 2587553424 + 10746224896 = 50868^2 + 103664^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (40).

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, 83336035 + ... + 83336194.

It is an arithmetic number, because the mean of its divisors is an integer number (1550051739).

Almost surely, 2^13333778320 is an apocalyptic number.

13333778320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13333778320 is an abundant number, since it is smaller than the sum of its proper divisors (17667256460).

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

13333778320 is a wasteful number, since it uses less digits than its factorization.

13333778320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166672242 (or 166672236 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 40.

The spelling of 13333778320 in words is "thirteen billion, three hundred thirty-three million, seven hundred seventy-eight thousand, three hundred twenty".