18100873 has 4 divisors (see below), whose sum is σ = 20686720. Its totient is φ = 15515028.

The previous prime is 18100871. The next prime is 18100877. The reversal of 18100873 is 37800181.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 37800181 = 131 ⋅288551.

It is a cyclic number.

It is not a de Polignac number, because 18100873 - 2¹ = 18100871 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18100871) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1292913 + ... + 1292926.

It is an arithmetic number, because the mean of its divisors is an integer number (5171680).

Almost surely, 2^18100873 is an apocalyptic number.

It is an amenable number.

18100873 is a deficient number, since it is larger than the sum of its proper divisors (2585847).

18100873 is an equidigital number, since it uses as much as digits as its factorization.

18100873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2585846.

The product of its (nonzero) digits is 1344, while the sum is 28.

The square root of 18100873 is about 4254.5120754324. The cubic root of 18100873 is about 262.5627870972.

The spelling of 18100873 in words is "eighteen million, one hundred thousand, eight hundred seventy-three".