19420538451876 has 27 divisors (see below), whose sum is σ = 49090872368811. Its totient is φ = 6473504003544.

The previous prime is 19420538451833. The next prime is 19420538451883. The reversal of 19420538451876 is 67815483502491.

It is a happy number.

The square root of 19420538451876 is 4406874.

It is a perfect power (a square), and thus also a powerful number.

19420538451876 is a `hidden beast` number, since 1 + 9 + 4 + 20 + 538 + 4 + 5 + 1 + 8 + 76 = 666.

It is an unprimeable number.

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 8 ways as a sum of consecutive naturals, for example, 26074005 + ... + 26808483.

It is a 2-persistent number, because it is pandigital, and so is 2⋅19420538451876 = 38841076903752, but 3⋅19420538451876 = 58261615355628 is not.

Almost surely, 2^{19420538451876} is an apocalyptic number.

19420538451876 is the 4406874-th square number.

It is an amenable number.

19420538451876 is an abundant number, since it is smaller than the sum of its proper divisors (29670333916935).

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

19420538451876 is an frugal number, since it uses more digits than its factorization.

19420538451876 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1468968 (or 734484 counting only the distinct ones).

The product of its (nonzero) digits is 58060800, while the sum is 63.

The spelling of 19420538451876 in words is "nineteen trillion, four hundred twenty billion, five hundred thirty-eight million, four hundred fifty-one thousand, eight hundred seventy-six".