21020323333 has 16 divisors (see below), whose sum is σ = 22715259840. Its totient is φ = 19386345600.

The previous prime is 21020323297. The next prime is 21020323361. The reversal of 21020323333 is 33332302012.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21020323333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21020323733) 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, 334903 + ... + 392683.

It is an arithmetic number, because the mean of its divisors is an integer number (1419703740).

Almost surely, 2^21020323333 is an apocalyptic number.

It is an amenable number.

21020323333 is a deficient number, since it is larger than the sum of its proper divisors (1694936507).

21020323333 is a wasteful number, since it uses less digits than its factorization.

21020323333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58308.

The product of its (nonzero) digits is 1944, while the sum is 22.

Adding to 21020323333 its reverse (33332302012), we get a palindrome (54352625345).

The spelling of 21020323333 in words is "twenty-one billion, twenty million, three hundred twenty-three thousand, three hundred thirty-three".