19550233928 has 32 divisors (see below), whose sum is σ = 37467964800. Its totient is φ = 9559125312.

The previous prime is 19550233909. The next prime is 19550233943. The reversal of 19550233928 is 82933205591.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 440951 + ... + 483257.

It is an arithmetic number, because the mean of its divisors is an integer number (1170873900).

Almost surely, 2^19550233928 is an apocalyptic number.

It is an amenable number.

19550233928 is a deficient number, since it is larger than the sum of its proper divisors (17917730872).

19550233928 is a wasteful number, since it uses less digits than its factorization.

19550233928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43589 (or 43585 counting only the distinct ones).

The product of its (nonzero) digits is 583200, while the sum is 47.

The spelling of 19550233928 in words is "nineteen billion, five hundred fifty million, two hundred thirty-three thousand, nine hundred twenty-eight".