18259950648 has 64 divisors (see below), whose sum is σ = 48401897760. Its totient is φ = 5720702976.

The previous prime is 18259950629. The next prime is 18259950649. The reversal of 18259950648 is 84605995281.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18259950649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 268536 + ... + 329592.

Almost surely, 2^18259950648 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 18259950648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24200948880).

18259950648 is an abundant number, since it is smaller than the sum of its proper divisors (30141947112).

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

18259950648 is a wasteful number, since it uses less digits than its factorization.

18259950648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61816 (or 61812 counting only the distinct ones).

The product of its (nonzero) digits is 6220800, while the sum is 57.

The spelling of 18259950648 in words is "eighteen billion, two hundred fifty-nine million, nine hundred fifty thousand, six hundred forty-eight".