19878282126 has 24 divisors (see below), whose sum is σ = 43712443944. Its totient is φ = 6527196720.

The previous prime is 19878282107. The next prime is 19878282139. The reversal of 19878282126 is 62128287891.

It is a super-2 number, since 2×19878282126² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8240205 + ... + 8242616.

It is an arithmetic number, because the mean of its divisors is an integer number (1821351831).

Almost surely, 2^19878282126 is an apocalyptic number.

19878282126 is an abundant number, since it is smaller than the sum of its proper divisors (23834161818).

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

19878282126 is a wasteful number, since it uses less digits than its factorization.

19878282126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16482896 (or 16482893 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 54.

The spelling of 19878282126 in words is "nineteen billion, eight hundred seventy-eight million, two hundred eighty-two thousand, one hundred twenty-six".