20518384067420 has 24 divisors (see below), whose sum is σ = 43102109842848. Its totient is φ = 8204781569600.

The previous prime is 20518384067413. The next prime is 20518384067471. The reversal of 20518384067420 is 2476048381502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 160688171 + ... + 160815810.

It is an arithmetic number, because the mean of its divisors is an integer number (1795921243452).

Almost surely, 2^{20518384067420} is an apocalyptic number.

20518384067420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20518384067420 is an abundant number, since it is smaller than the sum of its proper divisors (22583725775428).

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

20518384067420 is a wasteful number, since it uses less digits than its factorization.

20518384067420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321507181 (or 321507179 counting only the distinct ones).

The product of its (nonzero) digits is 2580480, while the sum is 50.

The spelling of 20518384067420 in words is "twenty trillion, five hundred eighteen billion, three hundred eighty-four million, sixty-seven thousand, four hundred twenty".