18237279648 has 192 divisors, whose sum is σ = 57669615360. Its totient is φ = 4935770112.

The previous prime is 18237279647. The next prime is 18237279649. The reversal of 18237279648 is 84697273281.

It is an interprime number because it is at equal distance from previous prime (18237279647) and next prime (18237279649).

It is a hoax number, since the sum of its digits (57) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (18237279647) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1024036 + ... + 1041692.

It is an arithmetic number, because the mean of its divisors is an integer number (300362580).

Almost surely, 2^18237279648 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 18237279648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28834807680).

18237279648 is an abundant number, since it is smaller than the sum of its proper divisors (39432335712).

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

18237279648 is a wasteful number, since it uses less digits than its factorization.

18237279648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17759 (or 17751 counting only the distinct ones).

The product of its digits is 8128512, while the sum is 57.

The spelling of 18237279648 in words is "eighteen billion, two hundred thirty-seven million, two hundred seventy-nine thousand, six hundred forty-eight".