18449745 has 16 divisors (see below), whose sum is σ = 29572992. Its totient is φ = 9822080.

The previous prime is 18449731. The next prime is 18449759. The reversal of 18449745 is 54794481.

It is an interprime number because it is at equal distance from previous prime (18449731) and next prime (18449759).

It is not a de Polignac number, because 18449745 - 2¹² = 18445649 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 18449697 and 18449706.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14869 + ... + 16061.

It is an arithmetic number, because the mean of its divisors is an integer number (1848312).

Almost surely, 2^18449745 is an apocalyptic number.

18449745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18449745 is a deficient number, since it is larger than the sum of its proper divisors (11123247).

18449745 is a wasteful number, since it uses less digits than its factorization.

18449745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2232.

The product of its digits is 161280, while the sum is 42.

The square root of 18449745 is about 4295.3166355928. The cubic root of 18449745 is about 264.2389222526.

The spelling of 18449745 in words is "eighteen million, four hundred forty-nine thousand, seven hundred forty-five".