20422232421 has 16 divisors (see below), whose sum is σ = 28386329088. Its totient is φ = 13045176000.

The previous prime is 20422232387. The next prime is 20422232423. The reversal of 20422232421 is 12423222402.

It is not a de Polignac number, because 20422232421 - 2⁶ = 20422232357 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20422232391 and 20422232400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20422232423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1077706 + ... + 1096491.

It is an arithmetic number, because the mean of its divisors is an integer number (1774145568).

Almost surely, 2^20422232421 is an apocalyptic number.

It is an amenable number.

20422232421 is a deficient number, since it is larger than the sum of its proper divisors (7964096667).

20422232421 is a wasteful number, since it uses less digits than its factorization.

20422232421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2174332.

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 20422232421 its reverse (12423222402), we get a palindrome (32845454823).

The spelling of 20422232421 in words is "twenty billion, four hundred twenty-two million, two hundred thirty-two thousand, four hundred twenty-one".