20331111220002 has 72 divisors (see below), whose sum is σ = 48426018420780. Its totient is φ = 6160101868800.

The previous prime is 20331111219971. The next prime is 20331111220019. The reversal of 20331111220002 is 20002211113302.

20331111220002 is a `hidden beast` number, since 2 + 0 + 331 + 111 + 220 + 0 + 0 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 20250999012321 + 80112207681 = 4500111^2 + 283041^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 15416302 + ... + 16683062.

Almost surely, 2^{20331111220002} is an apocalyptic number.

20331111220002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20331111220002 is an abundant number, since it is smaller than the sum of its proper divisors (28094907200778).

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

20331111220002 is a wasteful number, since it uses less digits than its factorization.

20331111220002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1274160 (or 1274146 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 20331111220002 its reverse (20002211113302), we get a palindrome (40333322333304).

The spelling of 20331111220002 in words is "twenty trillion, three hundred thirty-one billion, one hundred eleven million, two hundred twenty thousand, two".