18198007 has 4 divisors (see below), whose sum is σ = 19268496. Its totient is φ = 17127520.

The previous prime is 18198001. The next prime is 18198017. The reversal of 18198007 is 70089181.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70089181 = 17 ⋅4122893.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18198007 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 (18198001) 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, 535219 + ... + 535252.

It is an arithmetic number, because the mean of its divisors is an integer number (4817124).

Almost surely, 2^18198007 is an apocalyptic number.

18198007 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

18198007 is a deficient number, since it is larger than the sum of its proper divisors (1070489).

18198007 is a wasteful number, since it uses less digits than its factorization.

18198007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1070488.

The product of its (nonzero) digits is 4032, while the sum is 34.

The square root of 18198007 is about 4265.9122119425. The cubic root of 18198007 is about 263.0316095921.

It can be divided in two parts, 18 and 198007, that added together give a square (198025 = 445²).

The spelling of 18198007 in words is "eighteen million, one hundred ninety-eight thousand, seven".