20434404011 has 8 divisors (see below), whose sum is σ = 23354472960. Its totient is φ = 17514552168.

The previous prime is 20434403947. The next prime is 20434404017. The reversal of 20434404011 is 11040443402.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20434404011 - 2⁶ = 20434403947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20434404017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 314270 + ... + 373676.

It is an arithmetic number, because the mean of its divisors is an integer number (2919309120).

Almost surely, 2^20434404011 is an apocalyptic number.

20434404011 is a deficient number, since it is larger than the sum of its proper divisors (2920068949).

20434404011 is an equidigital number, since it uses as much as digits as its factorization.

20434404011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108553.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 20434404011 its reverse (11040443402), we get a palindrome (31474847413).

The spelling of 20434404011 in words is "twenty billion, four hundred thirty-four million, four hundred four thousand, eleven".