20013123654212 has 12 divisors (see below), whose sum is σ = 37717040733036. Its totient is φ = 9236826301920.

The previous prime is 20013123654203. The next prime is 20013123654221. The reversal of 20013123654212 is 21245632131002.

It is an interprime number because it is at equal distance from previous prime (20013123654203) and next prime (20013123654221).

It can be written as a sum of positive squares in 2 ways, for example, as 11097799544896 + 8915324109316 = 3331336^2 + 2985854^2 .

It is a super-2 number, since 2×20013123654212² (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 (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 192433881239 + ... + 192433881342.

It is an arithmetic number, because the mean of its divisors is an integer number (3143086727753).

Almost surely, 2^{20013123654212} is an apocalyptic number.

It is an amenable number.

20013123654212 is a deficient number, since it is larger than the sum of its proper divisors (17703917078824).

20013123654212 is a wasteful number, since it uses less digits than its factorization.

20013123654212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384867762598 (or 384867762596 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

Adding to 20013123654212 its reverse (21245632131002), we get a palindrome (41258755785214).

The spelling of 20013123654212 in words is "twenty trillion, thirteen billion, one hundred twenty-three million, six hundred fifty-four thousand, two hundred twelve".