18708768225 has 36 divisors (see below), whose sum is σ = 38296554816. Its totient is φ = 8552579040.

The previous prime is 18708768217. The next prime is 18708768233. The reversal of 18708768225 is 52286780781.

It is an interprime number because it is at equal distance from previous prime (18708768217) and next prime (18708768233).

It is not a de Polignac number, because 18708768225 - 2³ = 18708768217 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 5937717 + ... + 5940866.

Almost surely, 2^18708768225 is an apocalyptic number.

18708768225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18708768225 is an abundant number, since it is smaller than the sum of its proper divisors (19587786591).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18708768225 is a wasteful number, since it uses less digits than its factorization.

18708768225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11878606 (or 11878598 counting only the distinct ones).

The product of its (nonzero) digits is 3010560, while the sum is 54.

The spelling of 18708768225 in words is "eighteen billion, seven hundred eight million, seven hundred sixty-eight thousand, two hundred twenty-five".