18195406 has 8 divisors (see below), whose sum is σ = 28898640. Its totient is φ = 8562528.

The previous prime is 18195361. The next prime is 18195409. The reversal of 18195406 is 60459181.

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

It is a Harshad number since it is a multiple of its sum of digits (34), and also a Moran number because the ratio is a prime number: 535159 = 18195406 / (1 + 8 + 1 + 9 + 5 + 4 + 0 + 6).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18195409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 267546 + ... + 267613.

It is an arithmetic number, because the mean of its divisors is an integer number (3612330).

Almost surely, 2^18195406 is an apocalyptic number.

18195406 is a deficient number, since it is larger than the sum of its proper divisors (10703234).

18195406 is a wasteful number, since it uses less digits than its factorization.

18195406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535178.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 18195406 is about 4265.6073424543. The cubic root of 18195406 is about 263.0190774906.

It can be divided in two parts, 1819 and 5406, that added together give a square (7225 = 85²).

The spelling of 18195406 in words is "eighteen million, one hundred ninety-five thousand, four hundred six".