18147898 has 8 divisors (see below), whose sum is σ = 27246420. Its totient is φ = 9065760.

The previous prime is 18147893. The next prime is 18147917. The reversal of 18147898 is 89874181.

It can be written as a sum of positive squares in 2 ways, for example, as 18037009 + 110889 = 4247^2 + 333^2 .

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

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (18147893) 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, 793 + ... + 6076.

Almost surely, 2^18147898 is an apocalyptic number.

18147898 is a deficient number, since it is larger than the sum of its proper divisors (9098522).

18147898 is a wasteful number, since it uses less digits than its factorization.

18147898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8192.

The product of its digits is 129024, while the sum is 46.

The square root of 18147898 is about 4260.0349763822. The cubic root of 18147898 is about 262.7899646887.

The spelling of 18147898 in words is "eighteen million, one hundred forty-seven thousand, eight hundred ninety-eight".