20402143000145 has 4 divisors (see below), whose sum is σ = 24482571600180. Its totient is φ = 16321714400112.

The previous prime is 20402143000123. The next prime is 20402143000163. The reversal of 20402143000145 is 54100034120402.

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

It can be written as a sum of positive squares in 2 ways, for example, as 15055152729409 + 5346990270736 = 3880097^2 + 2312356^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20402143000145 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2040214300010 + ... + 2040214300019.

It is an arithmetic number, because the mean of its divisors is an integer number (6120642900045).

Almost surely, 2^{20402143000145} is an apocalyptic number.

It is an amenable number.

20402143000145 is a deficient number, since it is larger than the sum of its proper divisors (4080428600035).

20402143000145 is an equidigital number, since it uses as much as digits as its factorization.

20402143000145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4080428600034.

The product of its (nonzero) digits is 3840, while the sum is 26.

Adding to 20402143000145 its reverse (54100034120402), we get a palindrome (74502177120547).

The spelling of 20402143000145 in words is "twenty trillion, four hundred two billion, one hundred forty-three million, one hundred forty-five", and thus it is an aban number.