20497881117212 has 24 divisors (see below), whose sum is σ = 36746418115680. Its totient is φ = 9998907459840.

The previous prime is 20497881117211. The next prime is 20497881117221. The reversal of 20497881117212 is 21271118879402.

It is a super-3 number, since 3×20497881117212³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20497881117211) 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, 43205873 + ... + 43677719.

It is an arithmetic number, because the mean of its divisors is an integer number (1531100754820).

Almost surely, 2^{20497881117212} is an apocalyptic number.

It is an amenable number.

20497881117212 is a deficient number, since it is larger than the sum of its proper divisors (16248536998468).

20497881117212 is a wasteful number, since it uses less digits than its factorization.

20497881117212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 736781 (or 736779 counting only the distinct ones).

The product of its (nonzero) digits is 903168, while the sum is 53.

The spelling of 20497881117212 in words is "twenty trillion, four hundred ninety-seven billion, eight hundred eighty-one million, one hundred seventeen thousand, two hundred twelve".