19009901000 has 32 divisors (see below), whose sum is σ = 44483170680. Its totient is φ = 7603960000.

The previous prime is 19009900993. The next prime is 19009901011. The reversal of 19009901000 is 10990091.

It can be written as a sum of positive squares in 4 ways, for example, as 11554960036 + 7454940964 = 107494^2 + 86342^2 .

It is a super-2 number, since 2×19009901000² (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 (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9503951 + ... + 9505950.

Almost surely, 2^19009901000 is an apocalyptic number.

19009901000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19009901000 is an abundant number, since it is smaller than the sum of its proper divisors (25473269680).

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

19009901000 is a wasteful number, since it uses less digits than its factorization.

19009901000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19009922 (or 19009908 counting only the distinct ones).

The product of its (nonzero) digits is 729, while the sum is 29.

The spelling of 19009901000 in words is "nineteen billion, nine million, nine hundred one thousand".