19920304 has 10 divisors (see below), whose sum is σ = 38595620. Its totient is φ = 9960144.

The previous prime is 19920293. The next prime is 19920353. The reversal of 19920304 is 40302991.

It is a happy number.

It is a super-2 number, since 2×19920304² = 793637022904832, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622494 + ... + 622525.

It is an arithmetic number, because the mean of its divisors is an integer number (3859562).

Almost surely, 2^19920304 is an apocalyptic number.

It is an amenable number.

19920304 is a deficient number, since it is larger than the sum of its proper divisors (18675316).

19920304 is a wasteful number, since it uses less digits than its factorization.

19920304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1245027 (or 1245021 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 19920304 is about 4463.2167771687. The cubic root of 19920304 is about 271.0807346499.

It can be divided in two parts, 199 and 20304, that added together give a triangular number (20503 = T₂₀₂).

The spelling of 19920304 in words is "nineteen million, nine hundred twenty thousand, three hundred four".