21020441022 has 96 divisors (see below), whose sum is σ = 53246149632. Its totient is φ = 5868320832.

The previous prime is 21020441021. The next prime is 21020441053. The reversal of 21020441022 is 22014402012.

21020441022 is a `hidden beast` number, since 210 + 20 + 4 + 410 + 22 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 21020440986 and 21020441004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21020441021) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4042128 + ... + 4047324.

It is an arithmetic number, because the mean of its divisors is an integer number (554647392).

Almost surely, 2^21020441022 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21020441022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26623074816).

21020441022 is an abundant number, since it is smaller than the sum of its proper divisors (32225708610).

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

21020441022 is a wasteful number, since it uses less digits than its factorization.

21020441022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5942 (or 5939 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 21020441022 its reverse (22014402012), we get a palindrome (43034843034).

The spelling of 21020441022 in words is "twenty-one billion, twenty million, four hundred forty-one thousand, twenty-two".