18552938208 has 576 divisors, whose sum is σ = 62838478080. Its totient is φ = 4760985600.

The previous prime is 18552938149. The next prime is 18552938221. The reversal of 18552938208 is 80283925581.

It is a super-2 number, since 2×18552938208² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 223529335 + ... + 223529417.

It is an arithmetic number, because the mean of its divisors is an integer number (109094580).

Almost surely, 2^18552938208 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 18552938208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31419239040).

18552938208 is an abundant number, since it is smaller than the sum of its proper divisors (44285539872).

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

18552938208 is a wasteful number, since it uses less digits than its factorization.

18552938208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231 (or 216 counting only the distinct ones).

The product of its (nonzero) digits is 1382400, while the sum is 51.

The spelling of 18552938208 in words is "eighteen billion, five hundred fifty-two million, nine hundred thirty-eight thousand, two hundred eight".