20520210242212 has 24 divisors (see below), whose sum is σ = 37158239091960. Its totient is φ = 9903753027840.

The previous prime is 20520210242209. The next prime is 20520210242219. The reversal of 20520210242212 is 21224201202502.

It can be written as a sum of positive squares in 4 ways, for example, as 651581526436 + 19868628715776 = 807206^2 + 4457424^2 .

It is not an unprimeable number, because it can be changed into a prime (20520210242219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22364089 + ... + 23263552.

It is an arithmetic number, because the mean of its divisors is an integer number (1548259962165).

Almost surely, 2^{20520210242212} is an apocalyptic number.

It is an amenable number.

20520210242212 is a deficient number, since it is larger than the sum of its proper divisors (16638028849748).

20520210242212 is a wasteful number, since it uses less digits than its factorization.

20520210242212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45631551 (or 45631549 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 25.

Adding to 20520210242212 its reverse (21224201202502), we get a palindrome (41744411444714).

The spelling of 20520210242212 in words is "twenty trillion, five hundred twenty billion, two hundred ten million, two hundred forty-two thousand, two hundred twelve".