20185153 has 4 divisors (see below), whose sum is σ = 20385108. Its totient is φ = 19985200.

The previous prime is 20185147. The next prime is 20185159. The reversal of 20185153 is 35158102.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (20185147) and next prime (20185159).

It can be written as a sum of positive squares in 2 ways, for example, as 18948609 + 1236544 = 4353^2 + 1112^2 .

It is a cyclic number.

It is not a de Polignac number, because 20185153 - 2⁹ = 20184641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20185159) 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, 99826 + ... + 100027.

It is an arithmetic number, because the mean of its divisors is an integer number (5096277).

Almost surely, 2^20185153 is an apocalyptic number.

It is an amenable number.

20185153 is a deficient number, since it is larger than the sum of its proper divisors (199955).

20185153 is a wasteful number, since it uses less digits than its factorization.

20185153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199954.

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 20185153 is about 4492.7890001646. The cubic root of 20185153 is about 272.2768276286.

The spelling of 20185153 in words is "twenty million, one hundred eighty-five thousand, one hundred fifty-three".