21020342020034 has 16 divisors (see below), whose sum is σ = 36050265030336. Its totient is φ = 9004869759600.

The previous prime is 21020342020009. The next prime is 21020342020049. The reversal of 21020342020034 is 43002024302012.

It is a super-2 number, since 2×21020342020034² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21020342019991 and 21020342020009.

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, 320653472 + ... + 320719019.

It is an arithmetic number, because the mean of its divisors is an integer number (2253141564396).

Almost surely, 2^{21020342020034} is an apocalyptic number.

21020342020034 is a deficient number, since it is larger than the sum of its proper divisors (15029923010302).

21020342020034 is a wasteful number, since it uses less digits than its factorization.

21020342020034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641374841.

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 21020342020034 its reverse (43002024302012), we get a palindrome (64022366322046).

The spelling of 21020342020034 in words is "twenty-one trillion, twenty billion, three hundred forty-two million, twenty thousand, thirty-four".