20421430022113 has 24 divisors (see below), whose sum is σ = 22526345973888. Its totient is φ = 18475463337408.

The previous prime is 20421430022107. The next prime is 20421430022153. The reversal of 20421430022113 is 31122003412402.

It is a de Polignac number, because none of the positive numbers 2^k-20421430022113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20421430022153) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3129820 + ... + 7116082.

It is an arithmetic number, because the mean of its divisors is an integer number (938597748912).

Almost surely, 2^{20421430022113} is an apocalyptic number.

20421430022113 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

20421430022113 is a deficient number, since it is larger than the sum of its proper divisors (2104915951775).

20421430022113 is a wasteful number, since it uses less digits than its factorization.

20421430022113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3986941 (or 3986922 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 20421430022113 its reverse (31122003412402), we get a palindrome (51543433434515).

The spelling of 20421430022113 in words is "twenty trillion, four hundred twenty-one billion, four hundred thirty million, twenty-two thousand, one hundred thirteen".