20421132113 has 24 divisors (see below), whose sum is σ = 22119884640. Its totient is φ = 18838837440.

The previous prime is 20421132089. The next prime is 20421132133. The reversal of 20421132113 is 31123112402.

It is not a de Polignac number, because 20421132113 - 2¹² = 20421128017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20421132133) 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 23 ways as a sum of consecutive naturals, for example, 10937006 + ... + 10938872.

It is an arithmetic number, because the mean of its divisors is an integer number (921661860).

Almost surely, 2^20421132113 is an apocalyptic number.

It is an amenable number.

20421132113 is a deficient number, since it is larger than the sum of its proper divisors (1698752527).

20421132113 is a wasteful number, since it uses less digits than its factorization.

20421132113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2685 (or 2666 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 20421132113 its reverse (31123112402), we get a palindrome (51544244515).

The spelling of 20421132113 in words is "twenty billion, four hundred twenty-one million, one hundred thirty-two thousand, one hundred thirteen".