18181352 has 24 divisors (see below), whose sum is σ = 39656610. Its totient is φ = 7791840.

The previous prime is 18181349. The next prime is 18181367. The reversal of 18181352 is 25318181.

It can be written as a sum of positive squares in only one way, i.e., 14394436 + 3786916 = 3794^2 + 1946^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22799 + ... + 23582.

Almost surely, 2^18181352 is an apocalyptic number.

It is an amenable number.

18181352 is an abundant number, since it is smaller than the sum of its proper divisors (21475258).

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

18181352 is a wasteful number, since it uses less digits than its factorization.

18181352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46401 (or 46390 counting only the distinct ones).

The product of its digits is 1920, while the sum is 29.

The square root of 18181352 is about 4263.9596620981. The cubic root of 18181352 is about 262.9513420370.

The spelling of 18181352 in words is "eighteen million, one hundred eighty-one thousand, three hundred fifty-two".