19784546452 has 24 divisors (see below), whose sum is σ = 37777908672. Its totient is φ = 8991211200.

The previous prime is 19784546429. The next prime is 19784546473. The reversal of 19784546452 is 25464548791.

It is a super-2 number, since 2×19784546452² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 19784546393 and 19784546402.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 197568 + ... + 280360.

It is an arithmetic number, because the mean of its divisors is an integer number (1574079528).

Almost surely, 2^19784546452 is an apocalyptic number.

It is an amenable number.

19784546452 is a deficient number, since it is larger than the sum of its proper divisors (17993362220).

19784546452 is a wasteful number, since it uses less digits than its factorization.

19784546452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88239 (or 88237 counting only the distinct ones).

The product of its digits is 9676800, while the sum is 55.

The spelling of 19784546452 in words is "nineteen billion, seven hundred eighty-four million, five hundred forty-six thousand, four hundred fifty-two".