20434434234 has 16 divisors (see below), whose sum is σ = 40909872288. Its totient is φ = 6804644112.

The previous prime is 20434434221. The next prime is 20434434271. The reversal of 20434434234 is 43243443402.

It is a super-2 number, since 2×20434434234² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20434434195 and 20434434204.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1702012 + ... + 1713975.

It is an arithmetic number, because the mean of its divisors is an integer number (2556867018).

Almost surely, 2^20434434234 is an apocalyptic number.

20434434234 is an abundant number, since it is smaller than the sum of its proper divisors (20475438054).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20434434234 is a wasteful number, since it uses less digits than its factorization.

20434434234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3416989.

The product of its (nonzero) digits is 110592, while the sum is 33.

Adding to 20434434234 its reverse (43243443402), we get a palindrome (63677877636).

The spelling of 20434434234 in words is "twenty billion, four hundred thirty-four million, four hundred thirty-four thousand, two hundred thirty-four".