18646133988290 has 128 divisors (see below), whose sum is σ = 35187552092160. Its totient is φ = 7109005782528.

The previous prime is 18646133988277. The next prime is 18646133988331. The reversal of 18646133988290 is 9288933164681.

It is a self number, because there is not a number n which added to its sum of digits gives 18646133988290.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 925677959 + ... + 925698101.

It is an arithmetic number, because the mean of its divisors is an integer number (274902750720).

Almost surely, 2^{18646133988290} is an apocalyptic number.

18646133988290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18646133988290 is a deficient number, since it is larger than the sum of its proper divisors (16541418103870).

18646133988290 is a wasteful number, since it uses less digits than its factorization.

18646133988290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20616.

The product of its (nonzero) digits is 107495424, while the sum is 68.

The spelling of 18646133988290 in words is "eighteen trillion, six hundred forty-six billion, one hundred thirty-three million, nine hundred eighty-eight thousand, two hundred ninety".