19103939089 has 9 divisors (see below), whose sum is σ = 19333450993. Its totient is φ = 18877124992.

The previous prime is 19103939047. The next prime is 19103939117. The reversal of 19103939089 is 98093930191.

The square root of 19103939089 is 138217.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 9693387025 + 9410552064 = 98455^2 + 97008^2 .

It is a de Polignac number, because none of the positive numbers 2^k-19103939089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19103939009) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 12300537 + ... + 12302089.

Almost surely, 2^19103939089 is an apocalyptic number.

19103939089 is the 138217-th square number.

19103939089 is the 69109-th centered octagonal number.

It is an amenable number.

19103939089 is a deficient number, since it is larger than the sum of its proper divisors (229511904).

19103939089 is an frugal number, since it uses more digits than its factorization.

19103939089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3284 (or 1642 counting only the distinct ones).

The product of its (nonzero) digits is 472392, while the sum is 52.

The spelling of 19103939089 in words is "nineteen billion, one hundred three million, nine hundred thirty-nine thousand, eighty-nine".