18537007207 has 4 divisors (see below), whose sum is σ = 18989129376. Its totient is φ = 18084885040.

The previous prime is 18537007123. The next prime is 18537007211. The reversal of 18537007207 is 70270073581.

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 18537007207 - 2¹⁹ = 18536482919 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18537007207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18537007267) 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, 226061023 + ... + 226061104.

It is an arithmetic number, because the mean of its divisors is an integer number (4747282344).

Almost surely, 2^18537007207 is an apocalyptic number.

18537007207 is a deficient number, since it is larger than the sum of its proper divisors (452122169).

18537007207 is an equidigital number, since it uses as much as digits as its factorization.

18537007207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452122168.

The product of its (nonzero) digits is 82320, while the sum is 40.

The spelling of 18537007207 in words is "eighteen billion, five hundred thirty-seven million, seven thousand, two hundred seven".