18100073 has 8 divisors (see below), whose sum is σ = 18326400. Its totient is φ = 17875440.

The previous prime is 18100039. The next prime is 18100081. The reversal of 18100073 is 37000181.

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 18100073 - 2¹⁰ = 18099049 is a prime.

It is a super-2 number, since 2×18100073² = 655225285210658, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18100003) 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, 49136 + ... + 49502.

It is an arithmetic number, because the mean of its divisors is an integer number (2290800).

Almost surely, 2^18100073 is an apocalyptic number.

It is an amenable number.

18100073 is a deficient number, since it is larger than the sum of its proper divisors (226327).

18100073 is a wasteful number, since it uses less digits than its factorization.

18100073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 847.

The product of its (nonzero) digits is 168, while the sum is 20.

The square root of 18100073 is about 4254.4180565619. The cubic root of 18100073 is about 262.5589188985.

The spelling of 18100073 in words is "eighteen million, one hundred thousand, seventy-three".