18031825 has 24 divisors (see below), whose sum is σ = 25748352. Its totient is φ = 12270720.

The previous prime is 18031807. The next prime is 18031837. The reversal of 18031825 is 52813081.

It is not a de Polignac number, because 18031825 - 2¹¹ = 18029777 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18031793 and 18031802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28917 + ... + 29533.

It is an arithmetic number, because the mean of its divisors is an integer number (1072848).

Almost surely, 2^18031825 is an apocalyptic number.

It is an amenable number.

18031825 is a deficient number, since it is larger than the sum of its proper divisors (7716527).

18031825 is a wasteful number, since it uses less digits than its factorization.

18031825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 801 (or 796 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 18031825 is about 4246.3896429791. The cubic root of 18031825 is about 262.2285023619.

The spelling of 18031825 in words is "eighteen million, thirty-one thousand, eight hundred twenty-five".