18196269550 has 12 divisors (see below), whose sum is σ = 33845061456. Its totient is φ = 7278507800.

The previous prime is 18196269521. The next prime is 18196269587. The reversal of 18196269550 is 5596269181.

It is a super-2 number, since 2×18196269550² (a number of 21 digits) contains 22 as substring.

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 5 ways as a sum of consecutive naturals, for example, 181962646 + ... + 181962745.

It is an arithmetic number, because the mean of its divisors is an integer number (2820421788).

Almost surely, 2^18196269550 is an apocalyptic number.

18196269550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18196269550 is a deficient number, since it is larger than the sum of its proper divisors (15648791906).

18196269550 is a wasteful number, since it uses less digits than its factorization.

18196269550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363925403 (or 363925398 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 52.

The spelling of 18196269550 in words is "eighteen billion, one hundred ninety-six million, two hundred sixty-nine thousand, five hundred fifty".