20201043427 has 2 divisors, whose sum is σ = 20201043428. Its totient is φ = 20201043426.

The previous prime is 20201043397. The next prime is 20201043461. The reversal of 20201043427 is 72434010202.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20201043427 - 2¹¹ = 20201041379 is a prime.

It is not a weakly prime, because it can be changed into another prime (20201143427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10100521713 + 10100521714.

It is an arithmetic number, because the mean of its divisors is an integer number (10100521714).

Almost surely, 2^20201043427 is an apocalyptic number.

20201043427 is a deficient number, since it is larger than the sum of its proper divisors (1).

20201043427 is an equidigital number, since it uses as much as digits as its factorization.

20201043427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 25.

Adding to 20201043427 its reverse (72434010202), we get a palindrome (92635053629).

The spelling of 20201043427 in words is "twenty billion, two hundred one million, forty-three thousand, four hundred twenty-seven".