18804897 has 12 divisors (see below), whose sum is σ = 27608724. Its totient is φ = 12330720.

The previous prime is 18804883. The next prime is 18804911. The reversal of 18804897 is 79840881.

It is an interprime number because it is at equal distance from previous prime (18804883) and next prime (18804911).

It can be written as a sum of positive squares in 2 ways, for example, as 1838736 + 16966161 = 1356^2 + 4119^2 .

It is not a de Polignac number, because 18804897 - 2⁶ = 18804833 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18804827) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16578 + ... + 17675.

It is an arithmetic number, because the mean of its divisors is an integer number (2300727).

Almost surely, 2^18804897 is an apocalyptic number.

It is an amenable number.

18804897 is a deficient number, since it is larger than the sum of its proper divisors (8803827).

18804897 is a wasteful number, since it uses less digits than its factorization.

18804897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34320 (or 34317 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 45.

The square root of 18804897 is about 4336.4613453829. The cubic root of 18804897 is about 265.9236641904.

It can be divided in two parts, 18804 and 897, that added together give a triangular number (19701 = T₁₉₈).

The spelling of 18804897 in words is "eighteen million, eight hundred four thousand, eight hundred ninety-seven".