18920716 has 6 divisors (see below), whose sum is σ = 33111260. Its totient is φ = 9460356.

The previous prime is 18920701. The next prime is 18920747. The reversal of 18920716 is 61702981.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2365086 + ... + 2365093.

Almost surely, 2^18920716 is an apocalyptic number.

It is an amenable number.

18920716 is a deficient number, since it is larger than the sum of its proper divisors (14190544).

18920716 is a wasteful number, since it uses less digits than its factorization.

18920716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4730183 (or 4730181 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 18920716 is about 4349.7949376953. The cubic root of 18920716 is about 266.4684867820.

The spelling of 18920716 in words is "eighteen million, nine hundred twenty thousand, seven hundred sixteen".