20022171611620 has 24 divisors (see below), whose sum is σ = 42050398260024. Its totient is φ = 8008137620736.

The previous prime is 20022171611599. The next prime is 20022171611653. The reversal of 20022171611620 is 2611617122002.

It can be written as a sum of positive squares in 4 ways, for example, as 89304150244 + 19932867461376 = 298838^2 + 4464624^2 .

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, 45464377 + ... + 45902656.

It is an arithmetic number, because the mean of its divisors is an integer number (1752099927501).

Almost surely, 2^{20022171611620} is an apocalyptic number.

20022171611620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20022171611620 is an abundant number, since it is smaller than the sum of its proper divisors (22028226648404).

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

20022171611620 is a wasteful number, since it uses less digits than its factorization.

20022171611620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91377999 (or 91377997 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 31.

Adding to 20022171611620 its reverse (2611617122002), we get a palindrome (22633788733622).

The spelling of 20022171611620 in words is "twenty trillion, twenty-two billion, one hundred seventy-one million, six hundred eleven thousand, six hundred twenty".