18229761825 has 24 divisors (see below), whose sum is σ = 32879862816. Its totient is φ = 8838672000.

The previous prime is 18229761787. The next prime is 18229761829. The reversal of 18229761825 is 52816792281.

It is not a de Polignac number, because 18229761825 - 2⁸ = 18229761569 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (18229761829) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11047516 + ... + 11049165.

It is an arithmetic number, because the mean of its divisors is an integer number (1369994284).

Almost surely, 2^18229761825 is an apocalyptic number.

18229761825 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18229761825 is a deficient number, since it is larger than the sum of its proper divisors (14650100991).

18229761825 is a wasteful number, since it uses less digits than its factorization.

18229761825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22096705 (or 22096700 counting only the distinct ones).

The product of its digits is 967680, while the sum is 51.

The spelling of 18229761825 in words is "eighteen billion, two hundred twenty-nine million, seven hundred sixty-one thousand, eight hundred twenty-five".