18342071 has 4 divisors (see below), whose sum is σ = 20009544. Its totient is φ = 16674600.

The previous prime is 18342061. The next prime is 18342101. The reversal of 18342071 is 17024381.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17024381 = 11 ⋅1547671.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18342071 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18342071.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18342041) 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, 833720 + ... + 833741.

It is an arithmetic number, because the mean of its divisors is an integer number (5002386).

Almost surely, 2^18342071 is an apocalyptic number.

18342071 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

18342071 is a deficient number, since it is larger than the sum of its proper divisors (1667473).

18342071 is a wasteful number, since it uses less digits than its factorization.

18342071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1667472.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 18342071 is about 4282.7644109850. The cubic root of 18342071 is about 263.7238800755.

The spelling of 18342071 in words is "eighteen million, three hundred forty-two thousand, seventy-one".