19930380625 has 15 divisors (see below), whose sum is σ = 24909414717. Its totient is φ = 15941481000.

The previous prime is 19930380551. The next prime is 19930380667. The reversal of 19930380625 is 52608303991.

It is a happy number.

The square root of 19930380625 is 141175.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1562541841 + 18367838784 = 39529^2 + 135528^2 .

It is not a de Polignac number, because 19930380625 - 2³¹ = 17782896977 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 3526552 + ... + 3532198.

Almost surely, 2^19930380625 is an apocalyptic number.

19930380625 is the 141175-th square number.

19930380625 is the 70588-th centered octagonal number.

It is an amenable number.

19930380625 is a deficient number, since it is larger than the sum of its proper divisors (4979034092).

19930380625 is an frugal number, since it uses more digits than its factorization.

19930380625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11314 (or 5652 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 46.

The spelling of 19930380625 in words is "nineteen billion, nine hundred thirty million, three hundred eighty thousand, six hundred twenty-five".