20043213303421 has 16 divisors (see below), whose sum is σ = 25412482644480. Its totient is φ = 15353374924080.

The previous prime is 20043213303397. The next prime is 20043213303481. The reversal of 20043213303421 is 12430331234002.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20043213303421 - 2¹⁵ = 20043213270653 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20043213303421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20043213303481) 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, 2205940131 + ... + 2205949216.

It is an arithmetic number, because the mean of its divisors is an integer number (1588280165280).

Almost surely, 2^{20043213303421} is an apocalyptic number.

It is an amenable number.

20043213303421 is a deficient number, since it is larger than the sum of its proper divisors (5369269341059).

20043213303421 is a wasteful number, since it uses less digits than its factorization.

20043213303421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4411889424.

The product of its (nonzero) digits is 10368, while the sum is 28.

Adding to 20043213303421 its reverse (12430331234002), we get a palindrome (32473544537423).

The spelling of 20043213303421 in words is "twenty trillion, forty-three billion, two hundred thirteen million, three hundred three thousand, four hundred twenty-one".