19257225928 has 8 divisors (see below), whose sum is σ = 36107298630. Its totient is φ = 9628612960.

The previous prime is 19257225907. The next prime is 19257225931. The reversal of 19257225928 is 82952275291.

It can be written as a sum of positive squares in only one way, i.e., 19214949924 + 42276004 = 138618^2 + 6502^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×19257225928² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1203576613 + ... + 1203576628.

Almost surely, 2^19257225928 is an apocalyptic number.

It is an amenable number.

19257225928 is a deficient number, since it is larger than the sum of its proper divisors (16850072702).

19257225928 is a wasteful number, since it uses less digits than its factorization.

19257225928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2407153247 (or 2407153243 counting only the distinct ones).

The product of its digits is 1814400, while the sum is 52.

The spelling of 19257225928 in words is "nineteen billion, two hundred fifty-seven million, two hundred twenty-five thousand, nine hundred twenty-eight".