20442403121 has 8 divisors (see below), whose sum is σ = 23364252864. Its totient is φ = 17520930000.

The previous prime is 20442403063. The next prime is 20442403123. The reversal of 20442403121 is 12130424402.

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

It is not a de Polignac number, because 20442403121 - 2¹⁴ = 20442386737 is a prime.

It is a super-2 number, since 2×20442403121² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20442403123) 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, 33746 + ... + 204996.

It is an arithmetic number, because the mean of its divisors is an integer number (2920531608).

Almost surely, 2^20442403121 is an apocalyptic number.

It is an amenable number.

20442403121 is a deficient number, since it is larger than the sum of its proper divisors (2921849743).

20442403121 is a wasteful number, since it uses less digits than its factorization.

20442403121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188311.

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

Adding to 20442403121 its reverse (12130424402), we get a palindrome (32572827523).

The spelling of 20442403121 in words is "twenty billion, four hundred forty-two million, four hundred three thousand, one hundred twenty-one".