20424221413 has 8 divisors (see below), whose sum is σ = 22371358680. Its totient is φ = 18559941120.

The previous prime is 20424221383. The next prime is 20424221417. The reversal of 20424221413 is 31412242402.

It can be written as a sum of positive squares in 4 ways, for example, as 1304798884 + 19119422529 = 36122^2 + 138273^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20424221413 - 2¹⁷ = 20424090341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20424221417) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20713728 + ... + 20714713.

It is an arithmetic number, because the mean of its divisors is an integer number (2796419835).

Almost surely, 2^20424221413 is an apocalyptic number.

It is an amenable number.

20424221413 is a deficient number, since it is larger than the sum of its proper divisors (1947137267).

20424221413 is a wasteful number, since it uses less digits than its factorization.

20424221413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41428487.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 20424221413 its reverse (31412242402), we get a palindrome (51836463815).

The spelling of 20424221413 in words is "twenty billion, four hundred twenty-four million, two hundred twenty-one thousand, four hundred thirteen".