20420043034 has 16 divisors (see below), whose sum is σ = 33841914048. Its totient is φ = 9191630272.

The previous prime is 20420043031. The next prime is 20420043079. The reversal of 20420043034 is 43034002402.

It is a junction number, because it is equal to n+sod(n) for n = 20420042996 and 20420043014.

It is not an unprimeable number, because it can be changed into a prime (20420043031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13055512 + ... + 13057075.

It is an arithmetic number, because the mean of its divisors is an integer number (2115119628).

Almost surely, 2^20420043034 is an apocalyptic number.

20420043034 is a deficient number, since it is larger than the sum of its proper divisors (13421871014).

20420043034 is a wasteful number, since it uses less digits than its factorization.

20420043034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26112629.

The product of its (nonzero) digits is 2304, while the sum is 22.

Adding to 20420043034 its reverse (43034002402), we get a palindrome (63454045436).

The spelling of 20420043034 in words is "twenty billion, four hundred twenty million, forty-three thousand, thirty-four".