18981352 has 32 divisors (see below), whose sum is σ = 38543400. Its totient is φ = 8711424.

The previous prime is 18981343. The next prime is 18981359. The reversal of 18981352 is 25318981.

It can be written as a sum of positive squares in 4 ways, for example, as 16924996 + 2056356 = 4114^2 + 1434^2 .

It is not an unprimeable number, because it can be changed into a prime (18981359) 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, 23418 + ... + 24214.

Almost surely, 2^18981352 is an apocalyptic number.

It is an amenable number.

18981352 is an abundant number, since it is smaller than the sum of its proper divisors (19562048).

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

18981352 is a wasteful number, since it uses less digits than its factorization.

18981352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1045 (or 1041 counting only the distinct ones).

The product of its digits is 17280, while the sum is 37.

The square root of 18981352 is about 4356.7593461195. The cubic root of 18981352 is about 266.7528374295.

The spelling of 18981352 in words is "eighteen million, nine hundred eighty-one thousand, three hundred fifty-two".