18280551007 has 4 divisors (see below), whose sum is σ = 18307553976. Its totient is φ = 18253548040.

The previous prime is 18280550947. The next prime is 18280551031. The reversal of 18280551007 is 70015508281.

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 18280551007 - 2⁷ = 18280550879 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 (18280551097) 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, 13500469 + ... + 13501822.

It is an arithmetic number, because the mean of its divisors is an integer number (4576888494).

Almost surely, 2^18280551007 is an apocalyptic number.

18280551007 is a deficient number, since it is larger than the sum of its proper divisors (27002969).

18280551007 is an equidigital number, since it uses as much as digits as its factorization.

18280551007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27002968.

The product of its (nonzero) digits is 22400, while the sum is 37.

The spelling of 18280551007 in words is "eighteen billion, two hundred eighty million, five hundred fifty-one thousand, seven".