20442021355 has 32 divisors (see below), whose sum is σ = 28154221056. Its totient is φ = 13957810944.

The previous prime is 20442021349. The next prime is 20442021373. The reversal of 20442021355 is 55312024402.

It is not a de Polignac number, because 20442021355 - 2⁷ = 20442021227 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 10083852 + ... + 10085878.

It is an arithmetic number, because the mean of its divisors is an integer number (879819408).

Almost surely, 2^20442021355 is an apocalyptic number.

20442021355 is a deficient number, since it is larger than the sum of its proper divisors (7712199701).

20442021355 is a wasteful number, since it uses less digits than its factorization.

20442021355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3123.

The product of its (nonzero) digits is 9600, while the sum is 28.

Adding to 20442021355 its reverse (55312024402), we get a palindrome (75754045757).

The spelling of 20442021355 in words is "twenty billion, four hundred forty-two million, twenty-one thousand, three hundred fifty-five".