20422013421 has 16 divisors (see below), whose sum is σ = 28772904960. Its totient is φ = 12857885040.

The previous prime is 20422013399. The next prime is 20422013431. The reversal of 20422013421 is 12431022402.

It is not a de Polignac number, because 20422013421 - 2¹⁸ = 20421751277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20422013431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1867785 + ... + 1878686.

It is an arithmetic number, because the mean of its divisors is an integer number (1798306560).

Almost surely, 2^20422013421 is an apocalyptic number.

It is an amenable number.

20422013421 is a deficient number, since it is larger than the sum of its proper divisors (8350891539).

20422013421 is a wasteful number, since it uses less digits than its factorization.

20422013421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3746576.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 20422013421 its reverse (12431022402), we get a palindrome (32853035823).

The spelling of 20422013421 in words is "twenty billion, four hundred twenty-two million, thirteen thousand, four hundred twenty-one".