20434442404234 has 16 divisors (see below), whose sum is σ = 30671029367496. Its totient is φ = 10210766745600.

The previous prime is 20434442404213. The next prime is 20434442404261. The reversal of 20434442404234 is 43240424443402.

It can be written as a sum of positive squares in 4 ways, for example, as 16326828178609 + 4107614225625 = 4040647^2 + 2026725^2 .

It is a super-2 number, since 2×20434442404234² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53335914 + ... + 53717674.

Almost surely, 2^{20434442404234} is an apocalyptic number.

20434442404234 is a deficient number, since it is larger than the sum of its proper divisors (10236586963262).

20434442404234 is a wasteful number, since it uses less digits than its factorization.

20434442404234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398601.

The product of its (nonzero) digits is 1179648, while the sum is 40.

Adding to 20434442404234 its reverse (43240424443402), we get a palindrome (63674866847636).

The spelling of 20434442404234 in words is "twenty trillion, four hundred thirty-four billion, four hundred forty-two million, four hundred four thousand, two hundred thirty-four".