18190047 has 16 divisors (see below), whose sum is σ = 25200000. Its totient is φ = 11657184.

The previous prime is 18190037. The next prime is 18190063. The reversal of 18190047 is 74009181.

It is not a de Polignac number, because 18190047 - 2¹⁶ = 18124511 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18189996 and 18190023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18190027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36204 + ... + 36702.

It is an arithmetic number, because the mean of its divisors is an integer number (1575000).

Almost surely, 2^18190047 is an apocalyptic number.

18190047 is a deficient number, since it is larger than the sum of its proper divisors (7009953).

18190047 is a wasteful number, since it uses less digits than its factorization.

18190047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 950.

The product of its (nonzero) digits is 2016, while the sum is 30.

The square root of 18190047 is about 4264.9791324226. The cubic root of 18190047 is about 262.9932530666.

The spelling of 18190047 in words is "eighteen million, one hundred ninety thousand, forty-seven".