18477145 has 8 divisors (see below), whose sum is σ = 22195656. Its totient is φ = 14766336.

The previous prime is 18477127. The next prime is 18477161. The reversal of 18477145 is 54177481.

It can be written as a sum of positive squares in 4 ways, for example, as 363609 + 18113536 = 603^2 + 4256^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 18477145 - 2¹¹ = 18475097 is a prime.

It is a Duffinian 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, 8379 + ... + 10351.

It is an arithmetic number, because the mean of its divisors is an integer number (2774457).

Almost surely, 2^18477145 is an apocalyptic number.

It is an amenable number.

18477145 is a deficient number, since it is larger than the sum of its proper divisors (3718511).

18477145 is a wasteful number, since it uses less digits than its factorization.

18477145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3851.

The product of its digits is 31360, while the sum is 37.

The square root of 18477145 is about 4298.5049726620. The cubic root of 18477145 is about 264.3696659797.

The spelling of 18477145 in words is "eighteen million, four hundred seventy-seven thousand, one hundred forty-five".