20020012011220 has 48 divisors (see below), whose sum is σ = 45355598724240. Its totient is φ = 7379013159936.

The previous prime is 20020012011217. The next prime is 20020012011257. The reversal of 20020012011220 is 2211021002002.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 3179395683396 + 16840616327824 = 1783086^2 + 4103732^2 .

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a self number, because there is not a number n which added to its sum of digits gives 20020012011220.

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, 67514667 + ... + 67810546.

It is an arithmetic number, because the mean of its divisors is an integer number (944908306755).

Almost surely, 2^{20020012011220} is an apocalyptic number.

20020012011220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20020012011220 is an abundant number, since it is smaller than the sum of its proper divisors (25335586713020).

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

20020012011220 is a wasteful number, since it uses less digits than its factorization.

20020012011220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135325804 (or 135325802 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20020012011220 its reverse (2211021002002), we get a palindrome (22231033013222).

The spelling of 20020012011220 in words is "twenty trillion, twenty billion, twelve million, eleven thousand, two hundred twenty".