18133709380 has 24 divisors (see below), whose sum is σ = 38799297432. Its totient is φ = 7116625152.

The previous prime is 18133709369. The next prime is 18133709387. The reversal of 18133709380 is 8390733181.

It can be written as a sum of positive squares in 4 ways, for example, as 1875929344 + 16257780036 = 43312^2 + 127506^2 .

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (18133709387) 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, 8552577 + ... + 8554696.

It is an arithmetic number, because the mean of its divisors is an integer number (1616637393).

Almost surely, 2^18133709380 is an apocalyptic number.

18133709380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18133709380 is an abundant number, since it is smaller than the sum of its proper divisors (20665588052).

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

18133709380 is a wasteful number, since it uses less digits than its factorization.

18133709380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17107335 (or 17107333 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 43.

The spelling of 18133709380 in words is "eighteen billion, one hundred thirty-three million, seven hundred nine thousand, three hundred eighty".