18198470 has 8 divisors (see below), whose sum is σ = 32757264. Its totient is φ = 7279384.

The previous prime is 18198469. The next prime is 18198493. The reversal of 18198470 is 7489181.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 909914 + ... + 909933.

It is an arithmetic number, because the mean of its divisors is an integer number (4094658).

Almost surely, 2^18198470 is an apocalyptic number.

18198470 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18198470 is a deficient number, since it is larger than the sum of its proper divisors (14558794).

18198470 is a wasteful number, since it uses less digits than its factorization.

18198470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1819854.

The product of its (nonzero) digits is 16128, while the sum is 38.

The square root of 18198470 is about 4265.9664790057. The cubic root of 18198470 is about 263.0338402870.

The spelling of 18198470 in words is "eighteen million, one hundred ninety-eight thousand, four hundred seventy".