18672930 has 40 divisors (see below), whose sum is σ = 50211612. Its totient is φ = 4979232.

The previous prime is 18672923. The next prime is 18672931. The reversal of 18672930 is 3927681.

It can be written as a sum of positive squares in 2 ways, for example, as 18584721 + 88209 = 4311^2 + 297^2 .

It is not an unprimeable number, because it can be changed into a prime (18672931) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 10717 + ... + 12336.

Almost surely, 2^18672930 is an apocalyptic number.

18672930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18672930 is an abundant number, since it is smaller than the sum of its proper divisors (31538682).

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

18672930 is a wasteful number, since it uses less digits than its factorization.

18672930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23072 (or 23063 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 18672930 is about 4321.2185781328. The cubic root of 18672930 is about 265.3001464487.

The spelling of 18672930 in words is "eighteen million, six hundred seventy-two thousand, nine hundred thirty".