18919206025 has 12 divisors (see below), whose sum is σ = 24479808192. Its totient is φ = 14477305040.

The previous prime is 18919206023. The next prime is 18919206043. The reversal of 18919206025 is 52060291981.

It is not a de Polignac number, because 18919206025 - 2¹ = 18919206023 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18919206023) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16450909 + ... + 16452058.

It is an arithmetic number, because the mean of its divisors is an integer number (2039984016).

Almost surely, 2^18919206025 is an apocalyptic number.

It is an amenable number.

18919206025 is a deficient number, since it is larger than the sum of its proper divisors (5560602167).

18919206025 is a wasteful number, since it uses less digits than its factorization.

18919206025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32903000 (or 32902995 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 43.

The spelling of 18919206025 in words is "eighteen billion, nine hundred nineteen million, two hundred six thousand, twenty-five".