20333402221 has 4 divisors (see below), whose sum is σ = 22181893344. Its totient is φ = 18484911100.

The previous prime is 20333402203. The next prime is 20333402233. The reversal of 20333402221 is 12220433302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20333402221 - 2¹¹ = 20333400173 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20333402192 and 20333402201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20333402821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 924245545 + ... + 924245566.

It is an arithmetic number, because the mean of its divisors is an integer number (5545473336).

Almost surely, 2^20333402221 is an apocalyptic number.

It is an amenable number.

20333402221 is a deficient number, since it is larger than the sum of its proper divisors (1848491123).

20333402221 is a wasteful number, since it uses less digits than its factorization.

20333402221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1848491122.

The product of its (nonzero) digits is 1728, while the sum is 22.

Adding to 20333402221 its reverse (12220433302), we get a palindrome (32553835523).

The spelling of 20333402221 in words is "twenty billion, three hundred thirty-three million, four hundred two thousand, two hundred twenty-one".