20021023003212 has 432 divisors, whose sum is σ = 66046947063552. Its totient is φ = 5054436092160.

The previous prime is 20021023003193. The next prime is 20021023003237. The reversal of 20021023003212 is 21230032012002.

20021023003212 is a `hidden beast` number, since 20 + 0 + 21 + 0 + 2 + 300 + 321 + 2 = 666.

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 143 ways as a sum of consecutive naturals, for example, 109949113 + ... + 110131055.

It is an arithmetic number, because the mean of its divisors is an integer number (152886451536).

Almost surely, 2^{20021023003212} is an apocalyptic number.

20021023003212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20021023003212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33023473531776).

20021023003212 is an abundant number, since it is smaller than the sum of its proper divisors (46025924060340).

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

20021023003212 is a wasteful number, since it uses less digits than its factorization.

20021023003212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182138 (or 182126 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 20021023003212 its reverse (21230032012002), we get a palindrome (41251055015214).

The spelling of 20021023003212 in words is "twenty trillion, twenty-one billion, twenty-three million, three thousand, two hundred twelve".