18947322925 has 6 divisors (see below), whose sum is σ = 23494680458. Its totient is φ = 15157858320.

The previous prime is 18947322847. The next prime is 18947322967. The reversal of 18947322925 is 52922374981.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 1906370244 + 17040952681 = 43662^2 + 130541^2 .

It is a de Polignac number, because none of the positive numbers 2^k-18947322925 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 378946434 + ... + 378946483.

Almost surely, 2^18947322925 is an apocalyptic number.

It is an amenable number.

18947322925 is a deficient number, since it is larger than the sum of its proper divisors (4547357533).

18947322925 is an equidigital number, since it uses as much as digits as its factorization.

18947322925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 757892927 (or 757892922 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 52.

The spelling of 18947322925 in words is "eighteen billion, nine hundred forty-seven million, three hundred twenty-two thousand, nine hundred twenty-five".