18428651 has 4 divisors (see below), whose sum is σ = 19398600. Its totient is φ = 17458704.

The previous prime is 18428633. The next prime is 18428713. The reversal of 18428651 is 15682481.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18428651 - 2¹⁸ = 18166507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18428611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 484946 + ... + 484983.

It is an arithmetic number, because the mean of its divisors is an integer number (4849650).

Almost surely, 2^18428651 is an apocalyptic number.

18428651 is a deficient number, since it is larger than the sum of its proper divisors (969949).

18428651 is an equidigital number, since it uses as much as digits as its factorization.

18428651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 969948.

The product of its digits is 15360, while the sum is 35.

The square root of 18428651 is about 4292.8604682659. The cubic root of 18428651 is about 264.1381804553.

The spelling of 18428651 in words is "eighteen million, four hundred twenty-eight thousand, six hundred fifty-one".