18483947 has 4 divisors (see below), whose sum is σ = 19571256. Its totient is φ = 17396640.

The previous prime is 18483943. The next prime is 18484003. The reversal of 18483947 is 74938481.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18483947 - 2² = 18483943 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18483898 and 18483907.

It is not an unprimeable number, because it can be changed into a prime (18483943) 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, 543629 + ... + 543662.

It is an arithmetic number, because the mean of its divisors is an integer number (4892814).

Almost surely, 2^18483947 is an apocalyptic number.

18483947 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

18483947 is a deficient number, since it is larger than the sum of its proper divisors (1087309).

18483947 is a wasteful number, since it uses less digits than its factorization.

18483947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1087308.

The product of its digits is 193536, while the sum is 44.

The square root of 18483947 is about 4299.2961051781. The cubic root of 18483947 is about 264.4021028424.

The spelling of 18483947 in words is "eighteen million, four hundred eighty-three thousand, nine hundred forty-seven".