18954045 has 54 divisors (see below), whose sum is σ = 36734334. Its totient is φ = 9034080.

The previous prime is 18954041. The next prime is 18954049. The reversal of 18954045 is 54045981.

It is an interprime number because it is at equal distance from previous prime (18954041) and next prime (18954049).

It can be written as a sum of positive squares in only one way, i.e., 15163236 + 3790809 = 3894^2 + 1947^2 .

It is not a de Polignac number, because 18954045 - 2² = 18954041 is a prime.

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18954041) 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 53 ways as a sum of consecutive naturals, for example, 321226 + ... + 321284.

Almost surely, 2^18954045 is an apocalyptic number.

18954045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18954045 is a deficient number, since it is larger than the sum of its proper divisors (17780289).

18954045 is a wasteful number, since it uses less digits than its factorization.

18954045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151 (or 78 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 18954045 is about 4353.6243521921. The cubic root of 18954045 is about 266.6248571605.

The spelling of 18954045 in words is "eighteen million, nine hundred fifty-four thousand, forty-five".