19784507372 has 24 divisors (see below), whose sum is σ = 39746466816. Its totient is φ = 8441049168.

The previous prime is 19784507341. The next prime is 19784507381. The reversal of 19784507372 is 27370548791.

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 7 ways as a sum of consecutive naturals, for example, 1578038 + ... + 1590525.

It is an arithmetic number, because the mean of its divisors is an integer number (1656102784).

Almost surely, 2^19784507372 is an apocalyptic number.

It is an amenable number.

19784507372 is an abundant number, since it is smaller than the sum of its proper divisors (19961959444).

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

19784507372 is a wasteful number, since it uses less digits than its factorization.

19784507372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3168797 (or 3168795 counting only the distinct ones).

The product of its (nonzero) digits is 2963520, while the sum is 53.

The spelling of 19784507372 in words is "nineteen billion, seven hundred eighty-four million, five hundred seven thousand, three hundred seventy-two".