20021312322434 has 32 divisors (see below), whose sum is σ = 31008340577280. Its totient is φ = 9691600104000.

The previous prime is 20021312322397. The next prime is 20021312322439. The reversal of 20021312322434 is 43422321312002.

It is a super-2 number, since 2×20021312322434² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20021312322397 and 20021312322406.

It is not an unprimeable number, because it can be changed into a prime (20021312322439) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2977394 + ... + 6993389.

It is an arithmetic number, because the mean of its divisors is an integer number (969010643040).

Almost surely, 2^{20021312322434} is an apocalyptic number.

20021312322434 is a deficient number, since it is larger than the sum of its proper divisors (10987028254846).

20021312322434 is a wasteful number, since it uses less digits than its factorization.

20021312322434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9971106.

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 20021312322434 its reverse (43422321312002), we get a palindrome (63443633634436).

The spelling of 20021312322434 in words is "twenty trillion, twenty-one billion, three hundred twelve million, three hundred twenty-two thousand, four hundred thirty-four".