18125003 has 8 divisors (see below), whose sum is σ = 19630800. Its totient is φ = 16635168.

The previous prime is 18124999. The next prime is 18125017. The reversal of 18125003 is 30052181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18125003 - 2² = 18124999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18125603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1568 + ... + 6221.

It is an arithmetic number, because the mean of its divisors is an integer number (2453850).

Almost surely, 2^18125003 is an apocalyptic number.

18125003 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

18125003 is a deficient number, since it is larger than the sum of its proper divisors (1505797).

18125003 is a wasteful number, since it uses less digits than its factorization.

18125003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7981.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 18125003 is about 4257.3469438137. The cubic root of 18125003 is about 262.6794081173.

Adding to 18125003 its reverse (30052181), we get a palindrome (48177184).

The spelling of 18125003 in words is "eighteen million, one hundred twenty-five thousand, three".