1973050621218 has 64 divisors (see below), whose sum is σ = 4389489584640. Its totient is φ = 656944117200.

The previous prime is 1973050621207. The next prime is 1973050621231. The reversal of 1973050621218 is 8121260503791.

1973050621218 is a `hidden beast` number, since 1 + 9 + 7 + 3 + 0 + 5 + 0 + 621 + 2 + 18 = 666.

It is a super-3 number, since 3×1973050621218³ (a number of 38 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 217028853 + ... + 217037943.

It is an arithmetic number, because the mean of its divisors is an integer number (68585774760).

Almost surely, 2^{1973050621218} is an apocalyptic number.

1973050621218 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1973050621218 is an abundant number, since it is smaller than the sum of its proper divisors (2416438963422).

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

1973050621218 is a wasteful number, since it uses less digits than its factorization.

1973050621218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13180 (or 13174 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The spelling of 1973050621218 in words is "one trillion, nine hundred seventy-three billion, fifty million, six hundred twenty-one thousand, two hundred eighteen".