20043351321 has 16 divisors (see below), whose sum is σ = 31059916800. Its totient is φ = 11259218448.

The previous prime is 20043351259. The next prime is 20043351343. The reversal of 20043351321 is 12315334002.

It is not a de Polignac number, because 20043351321 - 2¹⁹ = 20042827033 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20043351291 and 20043351300.

It is not an unprimeable number, because it can be changed into a prime (20043351371) 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, 8087281 + ... + 8089758.

It is an arithmetic number, because the mean of its divisors is an integer number (1941244800).

Almost surely, 2^20043351321 is an apocalyptic number.

20043351321 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20043351321 is a deficient number, since it is larger than the sum of its proper divisors (11016565479).

20043351321 is a wasteful number, since it uses less digits than its factorization.

20043351321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16177108.

The product of its (nonzero) digits is 2160, while the sum is 24.

Adding to 20043351321 its reverse (12315334002), we get a palindrome (32358685323).

The spelling of 20043351321 in words is "twenty billion, forty-three million, three hundred fifty-one thousand, three hundred twenty-one".