21132020334 has 8 divisors (see below), whose sum is σ = 42264040680. Its totient is φ = 7044006776.

The previous prime is 21132020321. The next prime is 21132020341. The reversal of 21132020334 is 43302023112.

It is a sphenic number, since it is the product of 3 distinct primes.

21132020334 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 21132020334.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1761001689 + ... + 1761001700.

It is an arithmetic number, because the mean of its divisors is an integer number (5283005085).

Almost surely, 2^21132020334 is an apocalyptic number.

21132020334 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21132020334 is a wasteful number, since it uses less digits than its factorization.

21132020334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3522003394.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 21132020334 its reverse (43302023112), we get a palindrome (64434043446).

The spelling of 21132020334 in words is "twenty-one billion, one hundred thirty-two million, twenty thousand, three hundred thirty-four".