20318405286780 has 96 divisors (see below), whose sum is σ = 63864495132480. Its totient is φ = 5362383237120.

The previous prime is 20318405286713. The next prime is 20318405286791. The reversal of 20318405286780 is 8768250481302.

20318405286780 is a `hidden beast` number, since 2 + 0 + 3 + 1 + 8 + 40 + 528 + 6 + 78 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 193899561 + ... + 194004320.

It is an arithmetic number, because the mean of its divisors is an integer number (665255157630).

Almost surely, 2^{20318405286780} is an apocalyptic number.

20318405286780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20318405286780 is an abundant number, since it is smaller than the sum of its proper divisors (43546089845700).

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

20318405286780 is a wasteful number, since it uses less digits than its factorization.

20318405286780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387903996 (or 387903988 counting only the distinct ones).

The product of its (nonzero) digits is 5160960, while the sum is 54.

The spelling of 20318405286780 in words is "twenty trillion, three hundred eighteen billion, four hundred five million, two hundred eighty-six thousand, seven hundred eighty".