20018381918382 has 24 divisors (see below), whose sum is σ = 45258950425104. Its totient is φ = 6382672495584.

The previous prime is 20018381918369. The next prime is 20018381918399. The reversal of 20018381918382 is 28381918381002.

20018381918382 is a `hidden beast` number, since 2 + 0 + 0 + 1 + 8 + 381 + 9 + 183 + 82 = 666.

It is a super-2 number, since 2×20018381918382² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24176789343 + ... + 24176790170.

It is an arithmetic number, because the mean of its divisors is an integer number (1885789601046).

Almost surely, 2^{20018381918382} is an apocalyptic number.

20018381918382 is an abundant number, since it is smaller than the sum of its proper divisors (25240568506722).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20018381918382 is a wasteful number, since it uses less digits than its factorization.

20018381918382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48353579544 (or 48353579541 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 54.

The spelling of 20018381918382 in words is "twenty trillion, eighteen billion, three hundred eighty-one million, nine hundred eighteen thousand, three hundred eighty-two".