18628007 has 4 divisors (see below), whose sum is σ = 18643056. Its totient is φ = 18612960.

The previous prime is 18628003. The next prime is 18628013. The reversal of 18628007 is 70082681.

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 18628007 - 2² = 18628003 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18628003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5483 + ... + 8204.

It is an arithmetic number, because the mean of its divisors is an integer number (4660764).

Almost surely, 2^18628007 is an apocalyptic number.

18628007 is a deficient number, since it is larger than the sum of its proper divisors (15049).

18628007 is a wasteful number, since it uses less digits than its factorization.

18628007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15048.

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 18628007 is about 4316.0174930137. The cubic root of 18628007 is about 265.0872241649.

The spelling of 18628007 in words is "eighteen million, six hundred twenty-eight thousand, seven".