20204010421 has 16 divisors (see below), whose sum is σ = 23209236864. Its totient is φ = 17228749824.

The previous prime is 20204010419. The next prime is 20204010467. The reversal of 20204010421 is 12401040202.

It is a cyclic number.

It is not a de Polignac number, because 20204010421 - 2¹ = 20204010419 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20204010395 and 20204010404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20204010481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1085425 + ... + 1103881.

It is an arithmetic number, because the mean of its divisors is an integer number (1450577304).

Almost surely, 2^20204010421 is an apocalyptic number.

It is an amenable number.

20204010421 is a deficient number, since it is larger than the sum of its proper divisors (3005226443).

20204010421 is a wasteful number, since it uses less digits than its factorization.

20204010421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19260.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 20204010421 its reverse (12401040202), we get a palindrome (32605050623).

The spelling of 20204010421 in words is "twenty billion, two hundred four million, ten thousand, four hundred twenty-one".