20444133211 has 4 divisors (see below), whose sum is σ = 21333008592. Its totient is φ = 19555257832.

The previous prime is 20444133197. The next prime is 20444133221. The reversal of 20444133211 is 11233144402.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20444133211 - 2¹³ = 20444125019 is a prime.

It is a super-2 number, since 2×20444133211² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20444133221) 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 3 ways as a sum of consecutive naturals, for example, 444437656 + ... + 444437701.

It is an arithmetic number, because the mean of its divisors is an integer number (5333252148).

Almost surely, 2^20444133211 is an apocalyptic number.

20444133211 is a deficient number, since it is larger than the sum of its proper divisors (888875381).

20444133211 is an equidigital number, since it uses as much as digits as its factorization.

20444133211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 888875380.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 20444133211 its reverse (11233144402), we get a palindrome (31677277613).

The spelling of 20444133211 in words is "twenty billion, four hundred forty-four million, one hundred thirty-three thousand, two hundred eleven".