20444423133 has 16 divisors (see below), whose sum is σ = 27594141120. Its totient is φ = 13462237824.

The previous prime is 20444423123. The next prime is 20444423183. The reversal of 20444423133 is 33132444402.

It is a happy number.

It is not a de Polignac number, because 20444423133 - 2⁴ = 20444423117 is a prime.

It is a super-2 number, since 2×20444423133² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20444423133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20444423123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1569435 + ... + 1582407.

It is an arithmetic number, because the mean of its divisors is an integer number (1724633820).

Almost surely, 2^20444423133 is an apocalyptic number.

It is an amenable number.

20444423133 is a deficient number, since it is larger than the sum of its proper divisors (7149717987).

20444423133 is a wasteful number, since it uses less digits than its factorization.

20444423133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19388.

The product of its (nonzero) digits is 27648, while the sum is 30.

Adding to 20444423133 its reverse (33132444402), we get a palindrome (53576867535).

The spelling of 20444423133 in words is "twenty billion, four hundred forty-four million, four hundred twenty-three thousand, one hundred thirty-three".