20402220222420 has 48 divisors (see below), whose sum is σ = 57691822745088. Its totient is φ = 5386724809600.

The previous prime is 20402220222409. The next prime is 20402220222467. The reversal of 20402220222420 is 2422202220402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1683345444 + ... + 1683357563.

It is an arithmetic number, because the mean of its divisors is an integer number (1201912973856).

Almost surely, 2^{20402220222420} is an apocalyptic number.

20402220222420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20402220222420 is an abundant number, since it is smaller than the sum of its proper divisors (37289602522668).

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

20402220222420 is a wasteful number, since it uses less digits than its factorization.

20402220222420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3366703120 (or 3366703118 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 24.

Adding to 20402220222420 its reverse (2422202220402), we get a palindrome (22824422442822).

The spelling of 20402220222420 in words is "twenty trillion, four hundred two billion, two hundred twenty million, two hundred twenty-two thousand, four hundred twenty".