18657420784048 has 20 divisors (see below), whose sum is σ = 36148959209160. Its totient is φ = 9328657117184.

The previous prime is 18657420783997. The next prime is 18657420784061. The reversal of 18657420784048 is 84048702475681.

It is a happy number.

It is an unprimeable number.

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, 360190 + ... + 6119197.

It is an arithmetic number, because the mean of its divisors is an integer number (1807447960458).

Almost surely, 2^{18657420784048} is an apocalyptic number.

It is an amenable number.

18657420784048 is a deficient number, since it is larger than the sum of its proper divisors (17491538425112).

18657420784048 is a wasteful number, since it uses less digits than its factorization.

18657420784048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6659364 (or 6659358 counting only the distinct ones).

The product of its (nonzero) digits is 96337920, while the sum is 64.

The spelling of 18657420784048 in words is "eighteen trillion, six hundred fifty-seven billion, four hundred twenty million, seven hundred eighty-four thousand, forty-eight".