18145167950 has 144 divisors (see below), whose sum is σ = 43266762000. Its totient is φ = 5608673280.

The previous prime is 18145167947. The next prime is 18145167967. The reversal of 18145167950 is 5976154181.

It is a junction number, because it is equal to n+sod(n) for n = 18145167895 and 18145167904.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1362926 + ... + 1376174.

It is an arithmetic number, because the mean of its divisors is an integer number (300463625).

Almost surely, 2^18145167950 is an apocalyptic number.

18145167950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18145167950 is an abundant number, since it is smaller than the sum of its proper divisors (25121594050).

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

18145167950 is a wasteful number, since it uses less digits than its factorization.

18145167950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13331 (or 13319 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 47.

The spelling of 18145167950 in words is "eighteen billion, one hundred forty-five million, one hundred sixty-seven thousand, nine hundred fifty".