18927900007 has 4 divisors (see below), whose sum is σ = 18935135296. Its totient is φ = 18920664720.

The previous prime is 18927899999. The next prime is 18927900029. The reversal of 18927900007 is 70000972981.

It is a happy number.

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 18927900007 - 2³ = 18927899999 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 (18927900107) 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, 3613719 + ... + 3618952.

It is an arithmetic number, because the mean of its divisors is an integer number (4733783824).

Almost surely, 2^18927900007 is an apocalyptic number.

18927900007 is a deficient number, since it is larger than the sum of its proper divisors (7235289).

18927900007 is an equidigital number, since it uses as much as digits as its factorization.

18927900007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7235288.

The product of its (nonzero) digits is 63504, while the sum is 43.

The spelling of 18927900007 in words is "eighteen billion, nine hundred twenty-seven million, nine hundred thousand, seven".