18680773 has 8 divisors (see below), whose sum is σ = 20051928. Its totient is φ = 17339904.

The previous prime is 18680759. The next prime is 18680777. The reversal of 18680773 is 37708681.

It can be written as a sum of positive squares in 4 ways, for example, as 10745284 + 7935489 = 3278^2 + 2817^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18680773 - 2⁵ = 18680741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18680777) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6286 + ... + 8767.

It is an arithmetic number, because the mean of its divisors is an integer number (2506491).

Almost surely, 2^18680773 is an apocalyptic number.

It is an amenable number.

18680773 is a deficient number, since it is larger than the sum of its proper divisors (1371155).

18680773 is a wasteful number, since it uses less digits than its factorization.

18680773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15143.

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 18680773 is about 4322.1259815049. The cubic root of 18680773 is about 265.3372850195.

The spelling of 18680773 in words is "eighteen million, six hundred eighty thousand, seven hundred seventy-three".