18982047 has 16 divisors (see below), whose sum is σ = 30627072. Its totient is φ = 10208640.

The previous prime is 18982043. The next prime is 18982087. The reversal of 18982047 is 74028981.

It is not a de Polignac number, because 18982047 - 2² = 18982043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18981996 and 18982014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18982043) 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, 26229 + ... + 26942.

It is an arithmetic number, because the mean of its divisors is an integer number (1914192).

Almost surely, 2^18982047 is an apocalyptic number.

18982047 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

18982047 is a deficient number, since it is larger than the sum of its proper divisors (11645025).

18982047 is a wasteful number, since it uses less digits than its factorization.

18982047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53198.

The product of its (nonzero) digits is 32256, while the sum is 39.

The square root of 18982047 is about 4356.8391065083. The cubic root of 18982047 is about 266.7560930979.

The spelling of 18982047 in words is "eighteen million, nine hundred eighty-two thousand, forty-seven".