20221011144 has 24 divisors (see below), whose sum is σ = 54765238710. Its totient is φ = 6740337024.

The previous prime is 20221011143. The next prime is 20221011149. The reversal of 20221011144 is 44111012202.

It can be written as a sum of positive squares in only one way, i.e., 14842548900 + 5378462244 = 121830^2 + 73338^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (20221011143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 140423617 + ... + 140423760.

Almost surely, 2^20221011144 is an apocalyptic number.

20221011144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20221011144 is an abundant number, since it is smaller than the sum of its proper divisors (34544227566).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20221011144 is a wasteful number, since it uses less digits than its factorization.

20221011144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280847389 (or 280847382 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 20221011144 its reverse (44111012202), we get a palindrome (64332023346).

The spelling of 20221011144 in words is "twenty billion, two hundred twenty-one million, eleven thousand, one hundred forty-four".