18527633680 has 120 divisors (see below), whose sum is σ = 45026651592. Its totient is φ = 7089266688.

The previous prime is 18527633581. The next prime is 18527633681. The reversal of 18527633680 is 8633672581.

It can be written as a sum of positive squares in 12 ways, for example, as 4173676816 + 14353956864 = 64604^2 + 119808^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18527633681) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7601422 + ... + 7603858.

Almost surely, 2^18527633680 is an apocalyptic number.

18527633680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18527633680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22513325796).

18527633680 is an abundant number, since it is smaller than the sum of its proper divisors (26499017912).

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

18527633680 is a wasteful number, since it uses less digits than its factorization.

18527633680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2621 (or 2586 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 49.

The spelling of 18527633680 in words is "eighteen billion, five hundred twenty-seven million, six hundred thirty-three thousand, six hundred eighty".