18349845 has 8 divisors (see below), whose sum is σ = 29359776. Its totient is φ = 9786576.

The previous prime is 18349829. The next prime is 18349853. The reversal of 18349845 is 54894381.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18349845 - 2⁴ = 18349829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18349797 and 18349806.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 611647 + ... + 611676.

It is an arithmetic number, because the mean of its divisors is an integer number (3669972).

Almost surely, 2^18349845 is an apocalyptic number.

18349845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18349845 is a deficient number, since it is larger than the sum of its proper divisors (11009931).

18349845 is a wasteful number, since it uses less digits than its factorization.

18349845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1223331.

The product of its digits is 138240, while the sum is 42.

The square root of 18349845 is about 4283.6719062038. The cubic root of 18349845 is about 263.7611332273.

The spelling of 18349845 in words is "eighteen million, three hundred forty-nine thousand, eight hundred forty-five".