18274030646 has 4 divisors (see below), whose sum is σ = 27411045972. Its totient is φ = 9137015322.

The previous prime is 18274030601. The next prime is 18274030657. The reversal of 18274030646 is 64603047281.

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, 4568507660 + ... + 4568507663.

It is an arithmetic number, because the mean of its divisors is an integer number (6852761493).

Almost surely, 2^18274030646 is an apocalyptic number.

18274030646 is a deficient number, since it is larger than the sum of its proper divisors (9137015326).

18274030646 is an equidigital number, since it uses as much as digits as its factorization.

18274030646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9137015325.

The product of its (nonzero) digits is 193536, while the sum is 41.

The spelling of 18274030646 in words is "eighteen billion, two hundred seventy-four million, thirty thousand, six hundred forty-six".