18340971 has 16 divisors (see below), whose sum is σ = 26749440. Its totient is φ = 11085920.

The previous prime is 18340969. The next prime is 18340979. The reversal of 18340971 is 17904381.

It is a cyclic number.

It is not a de Polignac number, because 18340971 - 2¹ = 18340969 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (18340979) 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, 23341 + ... + 24113.

It is an arithmetic number, because the mean of its divisors is an integer number (1671840).

Almost surely, 2^18340971 is an apocalyptic number.

18340971 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

18340971 is a deficient number, since it is larger than the sum of its proper divisors (8408469).

18340971 is a wasteful number, since it uses less digits than its factorization.

18340971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1506.

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 18340971 is about 4282.6359873330. The cubic root of 18340971 is about 263.7186080051.

The spelling of 18340971 in words is "eighteen million, three hundred forty thousand, nine hundred seventy-one".