20401421333 has 4 divisors (see below), whose sum is σ = 20407688460. Its totient is φ = 20395154208.

The previous prime is 20401421311. The next prime is 20401421357. The reversal of 20401421333 is 33312410402.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16952560804 + 3448860529 = 130202^2 + 58727^2 .

It is a cyclic number.

It is not a de Polignac number, because 20401421333 - 2¹⁴ = 20401404949 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20401421299 and 20401421308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20401451333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3128678 + ... + 3135191.

It is an arithmetic number, because the mean of its divisors is an integer number (5101922115).

Almost surely, 2^20401421333 is an apocalyptic number.

It is an amenable number.

20401421333 is a deficient number, since it is larger than the sum of its proper divisors (6267127).

20401421333 is an equidigital number, since it uses as much as digits as its factorization.

20401421333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6267126.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 20401421333 its reverse (33312410402), we get a palindrome (53713831735).

The spelling of 20401421333 in words is "twenty billion, four hundred one million, four hundred twenty-one thousand, three hundred thirty-three".