18605010506 has 4 divisors (see below), whose sum is σ = 27907515762. Its totient is φ = 9302505252.

The previous prime is 18605010503. The next prime is 18605010559. The reversal of 18605010506 is 60501050681.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 10018208281 + 8586802225 = 100091^2 + 92665^2 .

It is a super-2 number, since 2×18605010506² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18605010503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4651252625 + ... + 4651252628.

Almost surely, 2^18605010506 is an apocalyptic number.

18605010506 is a deficient number, since it is larger than the sum of its proper divisors (9302505256).

18605010506 is an equidigital number, since it uses as much as digits as its factorization.

18605010506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9302505255.

The product of its (nonzero) digits is 7200, while the sum is 32.

The spelling of 18605010506 in words is "eighteen billion, six hundred five million, ten thousand, five hundred six".