22001331020 has 12 divisors (see below), whose sum is σ = 46202795184. Its totient is φ = 8800532400.

The previous prime is 22001330941. The next prime is 22001331083. The reversal of 22001331020 is 2013310022.

It is a happy number.

It is a super-2 number, since 2×22001331020² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22001330986 and 22001331004.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 550033256 + ... + 550033295.

It is an arithmetic number, because the mean of its divisors is an integer number (3850232932).

Almost surely, 2^22001331020 is an apocalyptic number.

22001331020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22001331020 is an abundant number, since it is smaller than the sum of its proper divisors (24201464164).

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

22001331020 is a wasteful number, since it uses less digits than its factorization.

22001331020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1100066560 (or 1100066558 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 22001331020 its reverse (2013310022), we get a palindrome (24014641042).

The spelling of 22001331020 in words is "twenty-two billion, one million, three hundred thirty-one thousand, twenty".