20434235564 has 24 divisors (see below), whose sum is σ = 36330342048. Its totient is φ = 10055350400.

The previous prime is 20434235537. The next prime is 20434235567. The reversal of 20434235564 is 46553243402.

It is not an unprimeable number, because it can be changed into a prime (20434235567) 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, 83969 + ... + 218904.

It is an arithmetic number, because the mean of its divisors is an integer number (1513764252).

Almost surely, 2^20434235564 is an apocalyptic number.

It is an amenable number.

20434235564 is a deficient number, since it is larger than the sum of its proper divisors (15896106484).

20434235564 is a wasteful number, since it uses less digits than its factorization.

20434235564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303145 (or 303143 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 38.

Adding to 20434235564 its reverse (46553243402), we get a palindrome (66987478966).

The spelling of 20434235564 in words is "twenty billion, four hundred thirty-four million, two hundred thirty-five thousand, five hundred sixty-four".