18311959606 has 8 divisors (see below), whose sum is σ = 27478208160. Its totient is φ = 9152556888.

The previous prime is 18311959579. The next prime is 18311959609. The reversal of 18311959606 is 60695911381.

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

It is a super-2 number, since 2×18311959606² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18311959606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18311959609) 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, 1704766 + ... + 1715473.

It is an arithmetic number, because the mean of its divisors is an integer number (3434776020).

Almost surely, 2^18311959606 is an apocalyptic number.

18311959606 is a deficient number, since it is larger than the sum of its proper divisors (9166248554).

18311959606 is a wasteful number, since it uses less digits than its factorization.

18311959606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3422918.

The product of its (nonzero) digits is 349920, while the sum is 49.

The spelling of 18311959606 in words is "eighteen billion, three hundred eleven million, nine hundred fifty-nine thousand, six hundred six".