20201423043 has 16 divisors (see below), whose sum is σ = 28232386560. Its totient is φ = 12824289984.

The previous prime is 20201423041. The next prime is 20201423057. The reversal of 20201423043 is 34032410202.

It is not a de Polignac number, because 20201423043 - 2¹ = 20201423041 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20201423041) 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 15 ways as a sum of consecutive naturals, for example, 641058 + ... + 671831.

It is an arithmetic number, because the mean of its divisors is an integer number (1764524160).

Almost surely, 2^20201423043 is an apocalyptic number.

20201423043 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

20201423043 is a deficient number, since it is larger than the sum of its proper divisors (8030963517).

20201423043 is a wasteful number, since it uses less digits than its factorization.

20201423043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1313138.

The product of its (nonzero) digits is 1152, while the sum is 21.

Adding to 20201423043 its reverse (34032410202), we get a palindrome (54233833245).

The spelling of 20201423043 in words is "twenty billion, two hundred one million, four hundred twenty-three thousand, forty-three".