18930628 has 6 divisors (see below), whose sum is σ = 33128606. Its totient is φ = 9465312.

The previous prime is 18930623. The next prime is 18930641. The reversal of 18930628 is 82603981.

It can be written as a sum of positive squares in only one way, i.e., 16908544 + 2022084 = 4112^2 + 1422^2 .

It is not an unprimeable number, because it can be changed into a prime (18930623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2366325 + ... + 2366332.

Almost surely, 2^18930628 is an apocalyptic number.

It is an amenable number.

18930628 is a deficient number, since it is larger than the sum of its proper divisors (14197978).

18930628 is a wasteful number, since it uses less digits than its factorization.

18930628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4732661 (or 4732659 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 18930628 is about 4350.9341525700. The cubic root of 18930628 is about 266.5150102954.

The spelling of 18930628 in words is "eighteen million, nine hundred thirty thousand, six hundred twenty-eight".