18975552 has 56 divisors (see below), whose sum is σ = 52401216. Its totient is φ = 6048768.

The previous prime is 18975533. The next prime is 18975557. The reversal of 18975552 is 25557981.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18975557) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2268 + ... + 6564.

It is an arithmetic number, because the mean of its divisors is an integer number (935736).

Almost surely, 2^18975552 is an apocalyptic number.

18975552 is a gapful number since it is divisible by the number (12) 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 18975552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26200608).

18975552 is an abundant number, since it is smaller than the sum of its proper divisors (33425664).

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

18975552 is a wasteful number, since it uses less digits than its factorization.

18975552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4335 (or 4325 counting only the distinct ones).

The product of its digits is 126000, while the sum is 42.

The square root of 18975552 is about 4356.0936629049. The cubic root of 18975552 is about 266.7256647239.

The spelling of 18975552 in words is "eighteen million, nine hundred seventy-five thousand, five hundred fifty-two".