21302020334 has 32 divisors (see below), whose sum is σ = 37083674880. Its totient is φ = 8988110208.

The previous prime is 21302020319. The next prime is 21302020409. The reversal of 21302020334 is 43302020312.

It is a Curzon number.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 1991669 + ... + 2002335.

It is an arithmetic number, because the mean of its divisors is an integer number (1158864840).

Almost surely, 2^21302020334 is an apocalyptic number.

21302020334 is a deficient number, since it is larger than the sum of its proper divisors (15781654546).

21302020334 is a wasteful number, since it uses less digits than its factorization.

21302020334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12872.

The product of its (nonzero) digits is 864, while the sum is 20.

Adding to 21302020334 its reverse (43302020312), we get a palindrome (64604040646).

The spelling of 21302020334 in words is "twenty-one billion, three hundred two million, twenty thousand, three hundred thirty-four".