18410945550 has 24 divisors (see below), whose sum is σ = 45659145336. Its totient is φ = 4909585440.

The previous prime is 18410945521. The next prime is 18410945591. The reversal of 18410945550 is 5554901481.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61369669 + ... + 61369968.

It is an arithmetic number, because the mean of its divisors is an integer number (1902464389).

Almost surely, 2^18410945550 is an apocalyptic number.

18410945550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18410945550 is an abundant number, since it is smaller than the sum of its proper divisors (27248199786).

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

18410945550 is a wasteful number, since it uses less digits than its factorization.

18410945550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122739652 (or 122739647 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 42.

The spelling of 18410945550 in words is "eighteen billion, four hundred ten million, nine hundred forty-five thousand, five hundred fifty".