18425001 has 32 divisors (see below), whose sum is σ = 30117888. Its totient is φ = 9789120.

The previous prime is 18424999. The next prime is 18425009. The reversal of 18425001 is 10052481.

It is not a de Polignac number, because 18425001 - 2¹ = 18424999 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (18425009) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17356 + ... + 18386.

It is an arithmetic number, because the mean of its divisors is an integer number (941184).

Almost surely, 2^18425001 is an apocalyptic number.

It is an amenable number.

18425001 is a deficient number, since it is larger than the sum of its proper divisors (11692887).

18425001 is a wasteful number, since it uses less digits than its factorization.

18425001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1101.

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 18425001 is about 4292.4353227509. The cubic root of 18425001 is about 264.1207407991.

Adding to 18425001 its reverse (10052481), we get a palindrome (28477482).

The spelling of 18425001 in words is "eighteen million, four hundred twenty-five thousand, one".