20424340121 has 8 divisors (see below), whose sum is σ = 20673503424. Its totient is φ = 20175250480.

The previous prime is 20424340093. The next prime is 20424340201. The reversal of 20424340121 is 12104342402.

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 20424340121 - 2¹⁰ = 20424339097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20424342121) 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, 717011 + ... + 744951.

It is an arithmetic number, because the mean of its divisors is an integer number (2584187928).

Almost surely, 2^20424340121 is an apocalyptic number.

It is an amenable number.

20424340121 is a deficient number, since it is larger than the sum of its proper divisors (249163303).

20424340121 is an equidigital number, since it uses as much as digits as its factorization.

20424340121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36831.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 20424340121 its reverse (12104342402), we get a palindrome (32528682523).

The spelling of 20424340121 in words is "twenty billion, four hundred twenty-four million, three hundred forty thousand, one hundred twenty-one".