18159257720 has 16 divisors (see below), whose sum is σ = 40858329960. Its totient is φ = 7263703072.

The previous prime is 18159257663. The next prime is 18159257747. The reversal of 18159257720 is 2775295181.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 226990682 + ... + 226990761.

Almost surely, 2^18159257720 is an apocalyptic number.

18159257720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18159257720 is an abundant number, since it is smaller than the sum of its proper divisors (22699072240).

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

18159257720 is a wasteful number, since it uses less digits than its factorization.

18159257720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 453981454 (or 453981450 counting only the distinct ones).

The product of its (nonzero) digits is 352800, while the sum is 47.

The spelling of 18159257720 in words is "eighteen billion, one hundred fifty-nine million, two hundred fifty-seven thousand, seven hundred twenty".