18151433780 has 72 divisors (see below), whose sum is σ = 40912633440. Its totient is φ = 6761695680.

The previous prime is 18151433731. The next prime is 18151433789. The reversal of 18151433780 is 8733415181.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18151433789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 404675 + ... + 447285.

It is an arithmetic number, because the mean of its divisors is an integer number (568231020).

Almost surely, 2^18151433780 is an apocalyptic number.

18151433780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18151433780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20456316720).

18151433780 is an abundant number, since it is smaller than the sum of its proper divisors (22761199660).

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

18151433780 is a wasteful number, since it uses less digits than its factorization.

18151433780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42717 (or 42696 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 41.

The spelling of 18151433780 in words is "eighteen billion, one hundred fifty-one million, four hundred thirty-three thousand, seven hundred eighty".