22001210020 has 24 divisors (see below), whose sum is σ = 46207164024. Its totient is φ = 8799603456.

The previous prime is 22001210009. The next prime is 22001210053. The reversal of 22001210020 is 2001210022.

It can be written as a sum of positive squares in 4 ways, for example, as 260887104 + 21740322916 = 16152^2 + 147446^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 22001209979 and 22001210006.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 172864 + ... + 271816.

It is an arithmetic number, because the mean of its divisors is an integer number (1925298501).

Almost surely, 2^22001210020 is an apocalyptic number.

22001210020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22001210020 is an abundant number, since it is smaller than the sum of its proper divisors (24205954004).

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

22001210020 is a wasteful number, since it uses less digits than its factorization.

22001210020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110079 (or 110077 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 22001210020 its reverse (2001210022), we get a palindrome (24002420042).

It can be divided in two parts, 220012 and 10020, that added together give a palindrome (230032).

The spelling of 22001210020 in words is "twenty-two billion, one million, two hundred ten thousand, twenty".