20939363818212 has 24 divisors (see below), whose sum is σ = 55838303515456. Its totient is φ = 5982675376608.

The previous prime is 20939363818187. The next prime is 20939363818277. The reversal of 20939363818212 is 21281836393902.

It is a happy number.

It is a super-2 number, since 2×20939363818212² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124639070263 + ... + 124639070430.

Almost surely, 2^{20939363818212} is an apocalyptic number.

It is an amenable number.

20939363818212 is an abundant number, since it is smaller than the sum of its proper divisors (34898939697244).

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

20939363818212 is a wasteful number, since it uses less digits than its factorization.

20939363818212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249278140707 (or 249278140705 counting only the distinct ones).

The product of its (nonzero) digits is 6718464, while the sum is 57.

The spelling of 20939363818212 in words is "twenty trillion, nine hundred thirty-nine billion, three hundred sixty-three million, eight hundred eighteen thousand, two hundred twelve".