18928930 has 8 divisors (see below), whose sum is σ = 34072092. Its totient is φ = 7571568.

The previous prime is 18928927. The next prime is 18928933. The reversal of 18928930 is 3982981.

It is an interprime number because it is at equal distance from previous prime (18928927) and next prime (18928933).

It can be written as a sum of positive squares in 2 ways, for example, as 18913801 + 15129 = 4349^2 + 123^2 .

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 (18928933) 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, 946437 + ... + 946456.

Almost surely, 2^18928930 is an apocalyptic number.

18928930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18928930 is a deficient number, since it is larger than the sum of its proper divisors (15143162).

18928930 is a wasteful number, since it uses less digits than its factorization.

18928930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1892900.

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 18928930 is about 4350.7390176842. The cubic root of 18928930 is about 266.5070416213.

The spelling of 18928930 in words is "eighteen million, nine hundred twenty-eight thousand, nine hundred thirty".