20370145 has 8 divisors (see below), whose sum is σ = 24468840. Its totient is φ = 16279680.

The previous prime is 20370137. The next prime is 20370149. The reversal of 20370145 is 54107302.

It can be written as a sum of positive squares in 4 ways, for example, as 219024 + 20151121 = 468^2 + 4489^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20370145 - 2³ = 20370137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20370149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7125 + ... + 9565.

It is an arithmetic number, because the mean of its divisors is an integer number (3058605).

Almost surely, 2^20370145 is an apocalyptic number.

It is an amenable number.

20370145 is a deficient number, since it is larger than the sum of its proper divisors (4098695).

20370145 is a wasteful number, since it uses less digits than its factorization.

20370145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4115.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 20370145 is about 4513.3297021157. The cubic root of 20370145 is about 273.1060830107.

Adding to 20370145 its reverse (54107302), we get a palindrome (74477447).

The spelling of 20370145 in words is "twenty million, three hundred seventy thousand, one hundred forty-five".