20034045421 has 16 divisors (see below), whose sum is σ = 22001532336. Its totient is φ = 18128088576.

The previous prime is 20034045407. The next prime is 20034045433. The reversal of 20034045421 is 12454043002.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 559842921 + 19474202500 = 23661^2 + 139550^2 .

It is not a de Polignac number, because 20034045421 - 2⁵ = 20034045389 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 (20034045481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 809791 + ... + 834163.

It is an arithmetic number, because the mean of its divisors is an integer number (1375095771).

Almost surely, 2^20034045421 is an apocalyptic number.

It is an amenable number.

20034045421 is a deficient number, since it is larger than the sum of its proper divisors (1967486915).

20034045421 is a wasteful number, since it uses less digits than its factorization.

20034045421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25632.

The product of its (nonzero) digits is 3840, while the sum is 25.

Adding to 20034045421 its reverse (12454043002), we get a palindrome (32488088423).

The spelling of 20034045421 in words is "twenty billion, thirty-four million, forty-five thousand, four hundred twenty-one".