19730645552 has 20 divisors (see below), whose sum is σ = 39546337920. Its totient is φ = 9525139008.

The previous prime is 19730645521. The next prime is 19730645563. The reversal of 19730645552 is 25554603791.

It is a junction number, because it is equal to n+sod(n) for n = 19730645497 and 19730645506.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21261008 + ... + 21261935.

It is an arithmetic number, because the mean of its divisors is an integer number (1977316896).

Almost surely, 2^19730645552 is an apocalyptic number.

It is an amenable number.

19730645552 is an abundant number, since it is smaller than the sum of its proper divisors (19815692368).

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

19730645552 is a wasteful number, since it uses less digits than its factorization.

19730645552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42522980 (or 42522974 counting only the distinct ones).

The product of its (nonzero) digits is 1134000, while the sum is 47.

The spelling of 19730645552 in words is "nineteen billion, seven hundred thirty million, six hundred forty-five thousand, five hundred fifty-two".