18055550506 has 16 divisors (see below), whose sum is σ = 31300153920. Its totient is φ = 7651147680.

The previous prime is 18055550479. The next prime is 18055550507. The reversal of 18055550506 is 60505555081.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (18055550507) 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, 7244160 + ... + 7246651.

It is an arithmetic number, because the mean of its divisors is an integer number (1956259620).

Almost surely, 2^18055550506 is an apocalyptic number.

18055550506 is a deficient number, since it is larger than the sum of its proper divisors (13244603414).

18055550506 is a wasteful number, since it uses less digits than its factorization.

18055550506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14490909.

The product of its (nonzero) digits is 150000, while the sum is 40.

The spelling of 18055550506 in words is "eighteen billion, fifty-five million, five hundred fifty thousand, five hundred six".