20180145 has 8 divisors (see below), whose sum is σ = 32288256. Its totient is φ = 10762736.

The previous prime is 20180141. The next prime is 20180161. The reversal of 20180145 is 54108102.

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 20180145 - 2² = 20180141 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20180141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 672657 + ... + 672686.

It is an arithmetic number, because the mean of its divisors is an integer number (4036032).

Almost surely, 2^20180145 is an apocalyptic number.

It is an amenable number.

20180145 is a deficient number, since it is larger than the sum of its proper divisors (12108111).

20180145 is a wasteful number, since it uses less digits than its factorization.

20180145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1345351.

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 20180145 is about 4492.2316280441. The cubic root of 20180145 is about 272.2543081868.

Adding to 20180145 its reverse (54108102), we get a palindrome (74288247).

The spelling of 20180145 in words is "twenty million, one hundred eighty thousand, one hundred forty-five".