18505607210 has 32 divisors (see below), whose sum is σ = 35847718992. Its totient is φ = 6852602880.

The previous prime is 18505607207. The next prime is 18505607243. The reversal of 18505607210 is 1270650581.

It can be written as a sum of positive squares in 8 ways, for example, as 7344318601 + 11161288609 = 85699^2 + 105647^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 881897 + ... + 902636.

Almost surely, 2^18505607210 is an apocalyptic number.

18505607210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18505607210 is a deficient number, since it is larger than the sum of its proper divisors (17342111782).

18505607210 is a wasteful number, since it uses less digits than its factorization.

18505607210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1784618.

The product of its (nonzero) digits is 16800, while the sum is 35.

The spelling of 18505607210 in words is "eighteen billion, five hundred five million, six hundred seven thousand, two hundred ten".