19009239876 has 81 divisors (see below), whose sum is σ = 52841831133.
Its totient is φ = 5757618240.
The previous prime is 19009239869. The next prime is 19009239901. The reversal of 19009239876 is 67893290091.
The square root of 19009239876 is 137874.
It is a perfect power (a square), and thus also a powerful number.
It can be written as a sum of positive squares in only one way, i.e., 16751089476 + 2258150400 = 129426^2 + 47520^2
It is a super-2 number, since 2×190092398762 (a number of 21 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 26 ways as a sum of consecutive naturals, for example, 9098640 + ... + 9100728.
Almost surely, 219009239876 is an apocalyptic number.
19009239876 is the 137874-th square number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 19009239876
19009239876 is an abundant number, since it is smaller than the sum of its proper divisors (33832591257).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
19009239876 is a wasteful number, since it uses less digits than its factorization.
19009239876 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 4210 (or 2105 counting only the distinct ones).
The product of its (nonzero) digits is 1469664, while the sum is 54.
The spelling of 19009239876 in words is "nineteen billion, nine million, two hundred thirty-nine thousand, eight hundred seventy-six".