20421134300434 has 48 divisors (see below), whose sum is σ = 35933080075200. Its totient is φ = 8678405274336.

The previous prime is 20421134300429. The next prime is 20421134300443. The reversal of 20421134300434 is 43400343112402.

It is a super-2 number, since 2×20421134300434² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20421134300396 and 20421134300405.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5556552 + ... + 8468620.

It is an arithmetic number, because the mean of its divisors is an integer number (748605834900).

Almost surely, 2^{20421134300434} is an apocalyptic number.

20421134300434 is a deficient number, since it is larger than the sum of its proper divisors (15511945774766).

20421134300434 is a wasteful number, since it uses less digits than its factorization.

20421134300434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2912687 (or 2912680 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 31.

Adding to 20421134300434 its reverse (43400343112402), we get a palindrome (63821477412836).

The spelling of 20421134300434 in words is "twenty trillion, four hundred twenty-one billion, one hundred thirty-four million, three hundred thousand, four hundred thirty-four".