18311900006 has 4 divisors (see below), whose sum is σ = 27467850012. Its totient is φ = 9155950002.

The previous prime is 18311899999. The next prime is 18311900039. The reversal of 18311900006 is 60000911381.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4577975000 + ... + 4577975003.

It is an arithmetic number, because the mean of its divisors is an integer number (6866962503).

Almost surely, 2^18311900006 is an apocalyptic number.

18311900006 is a deficient number, since it is larger than the sum of its proper divisors (9155950006).

18311900006 is an equidigital number, since it uses as much as digits as its factorization.

18311900006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9155950005.

The product of its (nonzero) digits is 1296, while the sum is 29.

The spelling of 18311900006 in words is "eighteen billion, three hundred eleven million, nine hundred thousand, six".