20350145 has 16 divisors (see below), whose sum is σ = 25501392. Its totient is φ = 15575040.

The previous prime is 20350129. The next prime is 20350171. The reversal of 20350145 is 54105302.

It can be written as a sum of positive squares in 8 ways, for example, as 5550736 + 14799409 = 2356^2 + 3847^2 .

It is not a de Polignac number, because 20350145 - 2⁴ = 20350129 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9929 + ... + 11801.

It is an arithmetic number, because the mean of its divisors is an integer number (1593837).

Almost surely, 2^20350145 is an apocalyptic number.

It is an amenable number.

20350145 is a deficient number, since it is larger than the sum of its proper divisors (5151247).

20350145 is a wasteful number, since it uses less digits than its factorization.

20350145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1972.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 20350145 is about 4511.1134989047. The cubic root of 20350145 is about 273.0166725808.

Adding to 20350145 its reverse (54105302), we get a palindrome (74455447).

The spelling of 20350145 in words is "twenty million, three hundred fifty thousand, one hundred forty-five".