20204402043 has 16 divisors (see below), whose sum is σ = 30789664256. Its totient is φ = 11544621120.

The previous prime is 20204402041. The next prime is 20204402089. The reversal of 20204402043 is 34020440202.

It is not a de Polignac number, because 20204402043 - 2¹ = 20204402041 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20204402041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 549855 + ... + 585447.

It is an arithmetic number, because the mean of its divisors is an integer number (1924354016).

Almost surely, 2^20204402043 is an apocalyptic number.

20204402043 is a deficient number, since it is larger than the sum of its proper divisors (10585262213).

20204402043 is a wasteful number, since it uses less digits than its factorization.

20204402043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62634.

The product of its (nonzero) digits is 1536, while the sum is 21.

Adding to 20204402043 its reverse (34020440202), we get a palindrome (54224842245).

The spelling of 20204402043 in words is "twenty billion, two hundred four million, four hundred two thousand, forty-three".