18149285 has 64 divisors (see below), whose sum is σ = 29859840. Its totient is φ = 10245120.

The previous prime is 18149279. The next prime is 18149293. The reversal of 18149285 is 58294181.

It is not a de Polignac number, because 18149285 - 2¹⁰ = 18148261 is a prime.

It is a super-2 number, since 2×18149285² = 658793092022450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 307586 + ... + 307644.

It is an arithmetic number, because the mean of its divisors is an integer number (466560).

Almost surely, 2^18149285 is an apocalyptic number.

It is an amenable number.

18149285 is a deficient number, since it is larger than the sum of its proper divisors (11710555).

18149285 is a wasteful number, since it uses less digits than its factorization.

18149285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146.

The product of its digits is 23040, while the sum is 38.

The square root of 18149285 is about 4260.1977653625. The cubic root of 18149285 is about 262.7966593189.

Subtracting 18149285 from its reverse (58294181), we obtain a square (40144896 = 6336²).

The spelling of 18149285 in words is "eighteen million, one hundred forty-nine thousand, two hundred eighty-five".