18205996810 has 8 divisors (see below), whose sum is σ = 32770794276. Its totient is φ = 7282398720.

The previous prime is 18205996777. The next prime is 18205996811. The reversal of 18205996810 is 1869950281.

It can be written as a sum of positive squares in 2 ways, for example, as 16055170681 + 2150826129 = 126709^2 + 46377^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×18205996810² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18205996811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 910299831 + ... + 910299850.

Almost surely, 2^18205996810 is an apocalyptic number.

18205996810 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18205996810 is a deficient number, since it is larger than the sum of its proper divisors (14564797466).

18205996810 is a wasteful number, since it uses less digits than its factorization.

18205996810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1820599688.

The product of its (nonzero) digits is 311040, while the sum is 49.

The spelling of 18205996810 in words is "eighteen billion, two hundred five million, nine hundred ninety-six thousand, eight hundred ten".