19836428 has 12 divisors (see below), whose sum is σ = 34764912. Its totient is φ = 9903600.

The previous prime is 19836391. The next prime is 19836431. The reversal of 19836428 is 82463891.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 248 + ... + 6303.

It is an arithmetic number, because the mean of its divisors is an integer number (2897076).

Almost surely, 2^19836428 is an apocalyptic number.

It is an amenable number.

19836428 is a deficient number, since it is larger than the sum of its proper divisors (14928484).

19836428 is a wasteful number, since it uses less digits than its factorization.

19836428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7312 (or 7310 counting only the distinct ones).

The product of its digits is 82944, while the sum is 41.

The square root of 19836428 is about 4453.8105033780. The cubic root of 19836428 is about 270.6997305118.

The spelling of 19836428 in words is "nineteen million, eight hundred thirty-six thousand, four hundred twenty-eight".