20197804 has 36 divisors (see below), whose sum is σ = 40219200. Its totient is φ = 8858080.

The previous prime is 20197799. The next prime is 20197811. The reversal of 20197804 is 40879102.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13317 + ... + 14755.

It is an arithmetic number, because the mean of its divisors is an integer number (1117200).

Almost surely, 2^20197804 is an apocalyptic number.

It is an amenable number.

20197804 is a deficient number, since it is larger than the sum of its proper divisors (20021396).

20197804 is a wasteful number, since it uses less digits than its factorization.

20197804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1494 (or 1481 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 20197804 is about 4494.1967024152. The cubic root of 20197804 is about 272.3336987155. Note that the first 3 decimals are identical.

The spelling of 20197804 in words is "twenty million, one hundred ninety-seven thousand, eight hundred four".