20278234956198 has 16 divisors (see below), whose sum is σ = 40556717351280. Its totient is φ = 6759370412256.

The previous prime is 20278234956197. The next prime is 20278234956233. The reversal of 20278234956198 is 89165943287202.

It is a super-2 number, since 2×20278234956198² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20278234956197) by changing a digit.

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, 9235965 + ... + 11218712.

It is an arithmetic number, because the mean of its divisors is an integer number (2534794834455).

It is a 1-persistent number, because it is pandigital, but 2⋅20278234956198 = 40556469912396 is not.

Almost surely, 2^{20278234956198} is an apocalyptic number.

20278234956198 is an abundant number, since it is smaller than the sum of its proper divisors (20278482395082).

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

20278234956198 is a wasteful number, since it uses less digits than its factorization.

20278234956198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20619911.

The product of its (nonzero) digits is 104509440, while the sum is 66.

The spelling of 20278234956198 in words is "twenty trillion, two hundred seventy-eight billion, two hundred thirty-four million, nine hundred fifty-six thousand, one hundred ninety-eight".