18205815950 has 96 divisors (see below), whose sum is σ = 41075299584. Its totient is φ = 5860707840.

The previous prime is 18205815907. The next prime is 18205816009. The reversal of 18205815950 is 5951850281.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 2632397 + ... + 2639303.

It is an arithmetic number, because the mean of its divisors is an integer number (427867704).

Almost surely, 2^18205815950 is an apocalyptic number.

18205815950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18205815950 is an abundant number, since it is smaller than the sum of its proper divisors (22869483634).

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

18205815950 is a wasteful number, since it uses less digits than its factorization.

18205815950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7386 (or 7381 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 44.

The spelling of 18205815950 in words is "eighteen billion, two hundred five million, eight hundred fifteen thousand, nine hundred fifty".