18049395 has 48 divisors (see below), whose sum is σ = 36197280. Its totient is φ = 7612416.

The previous prime is 18049391. The next prime is 18049399. The reversal of 18049395 is 59394081.

It is an interprime number because it is at equal distance from previous prime (18049391) and next prime (18049399).

It is not a de Polignac number, because 18049395 - 2² = 18049391 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (18049391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8611 + ... + 10499.

It is an arithmetic number, because the mean of its divisors is an integer number (754110).

Almost surely, 2^18049395 is an apocalyptic number.

18049395 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18049395 is an abundant number, since it is smaller than the sum of its proper divisors (18147885).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18049395 is a wasteful number, since it uses less digits than its factorization.

18049395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1924 (or 1917 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 18049395 is about 4248.4579555410. The cubic root of 18049395 is about 262.3136455120.

The spelling of 18049395 in words is "eighteen million, forty-nine thousand, three hundred ninety-five".