18354745 has 4 divisors (see below), whose sum is σ = 22025700. Its totient is φ = 14683792.

The previous prime is 18354731. The next prime is 18354761. The reversal of 18354745 is 54745381.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54745381 = 587 ⋅93263.

It can be written as a sum of positive squares in 2 ways, for example, as 5076009 + 13278736 = 2253^2 + 3644^2 .

It is a cyclic number.

It is not a de Polignac number, because 18354745 - 2¹⁵ = 18321977 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1835470 + ... + 1835479.

It is an arithmetic number, because the mean of its divisors is an integer number (5506425).

Almost surely, 2^18354745 is an apocalyptic number.

It is an amenable number.

18354745 is a deficient number, since it is larger than the sum of its proper divisors (3670955).

18354745 is an equidigital number, since it uses as much as digits as its factorization.

18354745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3670954.

The product of its digits is 67200, while the sum is 37.

The square root of 18354745 is about 4284.2438072547. The cubic root of 18354745 is about 263.7846087122.

The spelling of 18354745 in words is "eighteen million, three hundred fifty-four thousand, seven hundred forty-five".