20143045 has 16 divisors (see below), whose sum is σ = 27563760. Its totient is φ = 13999104.

The previous prime is 20143043. The next prime is 20143061. The reversal of 20143045 is 54034102.

It can be written as a sum of positive squares in 8 ways, for example, as 1324801 + 18818244 = 1151^2 + 4338^2 .

It is a cyclic number.

It is not a de Polignac number, because 20143045 - 2¹ = 20143043 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20143043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8010 + ... + 10219.

It is an arithmetic number, because the mean of its divisors is an integer number (1722735).

Almost surely, 2^20143045 is an apocalyptic number.

It is an amenable number.

20143045 is a deficient number, since it is larger than the sum of its proper divisors (7420715).

20143045 is a wasteful number, since it uses less digits than its factorization.

20143045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18264.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 20143045 is about 4488.1003776654. The cubic root of 20143045 is about 272.0873647056.

Adding to 20143045 its reverse (54034102), we get a palindrome (74177147).

The spelling of 20143045 in words is "twenty million, one hundred forty-three thousand, forty-five".