18729796 has 6 divisors (see below), whose sum is σ = 32777150. Its totient is φ = 9364896.

The previous prime is 18729791. The next prime is 18729803. The reversal of 18729796 is 69792781.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 18369796 + 360000 = 4286^2 + 600^2 .

It is not an unprimeable number, because it can be changed into a prime (18729791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2341221 + ... + 2341228.

Almost surely, 2^18729796 is an apocalyptic number.

It is an amenable number.

18729796 is a deficient number, since it is larger than the sum of its proper divisors (14047354).

18729796 is a wasteful number, since it uses less digits than its factorization.

18729796 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4682453 (or 4682451 counting only the distinct ones).

The product of its digits is 381024, while the sum is 49.

The square root of 18729796 is about 4327.7934331481. The cubic root of 18729796 is about 265.5691859846.

The spelling of 18729796 in words is "eighteen million, seven hundred twenty-nine thousand, seven hundred ninety-six".