18928916 has 6 divisors (see below), whose sum is σ = 33125610. Its totient is φ = 9464456.

The previous prime is 18928913. The next prime is 18928927. The reversal of 18928916 is 61982981.

It can be written as a sum of positive squares in only one way, i.e., 17606416 + 1322500 = 4196^2 + 1150^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18928913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2366111 + ... + 2366118.

It is an arithmetic number, because the mean of its divisors is an integer number (5520935).

Almost surely, 2^18928916 is an apocalyptic number.

It is an amenable number.

18928916 is a deficient number, since it is larger than the sum of its proper divisors (14196694).

18928916 is a wasteful number, since it uses less digits than its factorization.

18928916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4732233 (or 4732231 counting only the distinct ones).

The product of its digits is 62208, while the sum is 44.

The square root of 18928916 is about 4350.7374087619. The cubic root of 18928916 is about 266.5069759176.

The spelling of 18928916 in words is "eighteen million, nine hundred twenty-eight thousand, nine hundred sixteen".