20345020503212 has 48 divisors (see below), whose sum is σ = 36228753351168. Its totient is φ = 9994767456960.

The previous prime is 20345020503211. The next prime is 20345020503217. The reversal of 20345020503212 is 21230502054302.

It is a super-2 number, since 2×20345020503212² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20345020503211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 164500637 + ... + 164624267.

It is an arithmetic number, because the mean of its divisors is an integer number (754765694816).

Almost surely, 2^{20345020503212} is an apocalyptic number.

It is an amenable number.

20345020503212 is a deficient number, since it is larger than the sum of its proper divisors (15883732847956).

20345020503212 is a wasteful number, since it uses less digits than its factorization.

20345020503212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125286 (or 125284 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 29.

Adding to 20345020503212 its reverse (21230502054302), we get a palindrome (41575522557514).

The spelling of 20345020503212 in words is "twenty trillion, three hundred forty-five billion, twenty million, five hundred three thousand, two hundred twelve".