18481930 has 8 divisors (see below), whose sum is σ = 33267492. Its totient is φ = 7392768.

The previous prime is 18481919. The next prime is 18481937. The reversal of 18481930 is 3918481.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 18481401 + 529 = 4299^2 + 23^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (18481937) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 924087 + ... + 924106.

Almost surely, 2^18481930 is an apocalyptic number.

18481930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18481930 is a deficient number, since it is larger than the sum of its proper divisors (14785562).

18481930 is a wasteful number, since it uses less digits than its factorization.

18481930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1848200.

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 18481930 is about 4299.0615254960. The cubic root of 18481930 is about 264.3924851556.

The spelling of 18481930 in words is "eighteen million, four hundred eighty-one thousand, nine hundred thirty".