19928023265 has 32 divisors (see below), whose sum is σ = 24716482560. Its totient is φ = 15416440000.

The previous prime is 19928023231. The next prime is 19928023273. The reversal of 19928023265 is 56232082991.

It is not a de Polignac number, because 19928023265 - 2¹⁰ = 19928022241 is a prime.

It is a super-2 number, since 2×19928023265² (a number of 21 digits) contains 22 as substring.

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 31 ways as a sum of consecutive naturals, for example, 7725746 + ... + 7728324.

It is an arithmetic number, because the mean of its divisors is an integer number (772390080).

Almost surely, 2^19928023265 is an apocalyptic number.

It is an amenable number.

19928023265 is a deficient number, since it is larger than the sum of its proper divisors (4788459295).

19928023265 is a wasteful number, since it uses less digits than its factorization.

19928023265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3013.

The product of its (nonzero) digits is 466560, while the sum is 47.

The spelling of 19928023265 in words is "nineteen billion, nine hundred twenty-eight million, twenty-three thousand, two hundred sixty-five".