18930724828 has 12 divisors (see below), whose sum is σ = 33199711272. Its totient is φ = 9445093040.

The previous prime is 18930724823. The next prime is 18930724831. The reversal of 18930724828 is 82842703981.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18930724823) 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, 5065243 + ... + 5068978.

It is an arithmetic number, because the mean of its divisors is an integer number (2766642606).

Almost surely, 2^18930724828 is an apocalyptic number.

It is an amenable number.

18930724828 is a deficient number, since it is larger than the sum of its proper divisors (14268986444).

18930724828 is a wasteful number, since it uses less digits than its factorization.

18930724828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10134692 (or 10134690 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 52.

The spelling of 18930724828 in words is "eighteen billion, nine hundred thirty million, seven hundred twenty-four thousand, eight hundred twenty-eight".