20134033421 has 4 divisors (see below), whose sum is σ = 20409842172. Its totient is φ = 19858224672.

The previous prime is 20134033399. The next prime is 20134033433. The reversal of 20134033421 is 12433043102.

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 6274857796 + 13859175625 = 79214^2 + 117725^2 .

It is a cyclic number.

It is not a de Polignac number, because 20134033421 - 2¹⁰ = 20134032397 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 (20134033471) 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, 137904266 + ... + 137904411.

It is an arithmetic number, because the mean of its divisors is an integer number (5102460543).

Almost surely, 2^20134033421 is an apocalyptic number.

It is an amenable number.

20134033421 is a deficient number, since it is larger than the sum of its proper divisors (275808751).

20134033421 is an equidigital number, since it uses as much as digits as its factorization.

20134033421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275808750.

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

Adding to 20134033421 its reverse (12433043102), we get a palindrome (32567076523).

The spelling of 20134033421 in words is "twenty billion, one hundred thirty-four million, thirty-three thousand, four hundred twenty-one".