18307342 has 4 divisors (see below), whose sum is σ = 27461016. Its totient is φ = 9153670.

The previous prime is 18307339. The next prime is 18307343. The reversal of 18307342 is 24370381.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24370381 = 7 ⋅3481483.

It is a super-2 number, since 2×18307342² = 670317542209928, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18307342.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18307343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4576834 + ... + 4576837.

It is an arithmetic number, because the mean of its divisors is an integer number (6865254).

Almost surely, 2^18307342 is an apocalyptic number.

18307342 is a deficient number, since it is larger than the sum of its proper divisors (9153674).

18307342 is an equidigital number, since it uses as much as digits as its factorization.

18307342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9153673.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 18307342 is about 4278.7079825574. The cubic root of 18307342 is about 263.5573293952.

The spelling of 18307342 in words is "eighteen million, three hundred seven thousand, three hundred forty-two".