18620173 has 8 divisors (see below), whose sum is σ = 21875616. Its totient is φ = 15625200.

The previous prime is 18620159. The next prime is 18620201. The reversal of 18620173 is 37102681.

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 18620173 - 2⁵ = 18620141 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 (18620113) 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, 64963 + ... + 65248.

It is an arithmetic number, because the mean of its divisors is an integer number (2734452).

Almost surely, 2^18620173 is an apocalyptic number.

18620173 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

18620173 is a deficient number, since it is larger than the sum of its proper divisors (3255443).

18620173 is a wasteful number, since it uses less digits than its factorization.

18620173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130235.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 18620173 is about 4315.1098479645. The cubic root of 18620173 is about 265.0500581832.

The spelling of 18620173 in words is "eighteen million, six hundred twenty thousand, one hundred seventy-three".