18645950848 has 64 divisors (see below), whose sum is σ = 42488075520. Its totient is φ = 7984488960.

The previous prime is 18645950837. The next prime is 18645950879. The reversal of 18645950848 is 84805954681.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a junction number, because it is equal to n+sod(n) for n = 18645950792 and 18645950801.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1159503 + ... + 1175473.

It is an arithmetic number, because the mean of its divisors is an integer number (663876180).

Almost surely, 2^18645950848 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18645950848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21244037760).

18645950848 is an abundant number, since it is smaller than the sum of its proper divisors (23842124672).

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

18645950848 is a wasteful number, since it uses less digits than its factorization.

18645950848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17295 (or 17283 counting only the distinct ones).

The product of its (nonzero) digits is 11059200, while the sum is 58.

The spelling of 18645950848 in words is "eighteen billion, six hundred forty-five million, nine hundred fifty thousand, eight hundred forty-eight".