19045380025 has 27 divisors (see below), whose sum is σ = 27478958031. Its totient is φ = 13056377040.

The previous prime is 19045379987. The next prime is 19045380049. The reversal of 19045380025 is 52008354091.

The square root of 19045380025 is 138005.

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

It can be written as a sum of positive squares in only one way, i.e., 6856336809 + 12189043216 = 82803^2 + 110404^2 .

It is not a de Polignac number, because 19045380025 - 2³³ = 10455445433 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 4828204 + ... + 4832146.

Almost surely, 2^19045380025 is an apocalyptic number.

19045380025 is the 138005-th square number.

19045380025 is the 69003-rd centered octagonal number.

It is an amenable number.

19045380025 is a deficient number, since it is larger than the sum of its proper divisors (8433578006).

19045380025 is an frugal number, since it uses more digits than its factorization.

19045380025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7910 (or 3955 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 37.

The spelling of 19045380025 in words is "nineteen billion, forty-five million, three hundred eighty thousand, twenty-five".