20281310068 has 12 divisors (see below), whose sum is σ = 37360308160. Its totient is φ = 9606936312.

The previous prime is 20281310057. The next prime is 20281310099. The reversal of 20281310068 is 86001318202.

It is a super-2 number, since 2×20281310068² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 133429596 + ... + 133429747.

Almost surely, 2^20281310068 is an apocalyptic number.

It is an amenable number.

20281310068 is a deficient number, since it is larger than the sum of its proper divisors (17078998092).

20281310068 is a wasteful number, since it uses less digits than its factorization.

20281310068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266859366 (or 266859364 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 31.

The spelling of 20281310068 in words is "twenty billion, two hundred eighty-one million, three hundred ten thousand, sixty-eight".