18145153 has 4 divisors (see below), whose sum is σ = 19540948. Its totient is φ = 16749360.

The previous prime is 18145151. The next prime is 18145157. The reversal of 18145153 is 35154181.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2241009 + 15904144 = 1497^2 + 3988^2 .

It is a cyclic number.

It is not a de Polignac number, because 18145153 - 2¹ = 18145151 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18145151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 697878 + ... + 697903.

It is an arithmetic number, because the mean of its divisors is an integer number (4885237).

Almost surely, 2^18145153 is an apocalyptic number.

18145153 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

18145153 is a deficient number, since it is larger than the sum of its proper divisors (1395795).

18145153 is a wasteful number, since it uses less digits than its factorization.

18145153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1395794.

The product of its digits is 2400, while the sum is 28.

The square root of 18145153 is about 4259.7127837449. The cubic root of 18145153 is about 262.7767143970.

Subtracting 18145153 from its reverse (35154181), we obtain a triangular number (17009028 = T₅₈₃₂).

The spelling of 18145153 in words is "eighteen million, one hundred forty-five thousand, one hundred fifty-three".