18870873 has 8 divisors (see below), whose sum is σ = 28755648. Its totient is φ = 10783344.

The previous prime is 18870871. The next prime is 18870883. The reversal of 18870873 is 37807881.

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

It is not a de Polignac number, because 18870873 - 2¹ = 18870871 is a prime.

It is a super-2 number, since 2×18870873² = 712219695564258, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18870871) 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, 449286 + ... + 449327.

It is an arithmetic number, because the mean of its divisors is an integer number (3594456).

Almost surely, 2^18870873 is an apocalyptic number.

It is an amenable number.

18870873 is a deficient number, since it is larger than the sum of its proper divisors (9884775).

18870873 is an equidigital number, since it uses as much as digits as its factorization.

18870873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 898623.

The product of its (nonzero) digits is 75264, while the sum is 42.

The square root of 18870873 is about 4344.0618089525. The cubic root of 18870873 is about 266.2342942972.

The spelling of 18870873 in words is "eighteen million, eight hundred seventy thousand, eight hundred seventy-three".