18761586312020 has 24 divisors (see below), whose sum is σ = 39403742167944. Its totient is φ = 7503794350976.

The previous prime is 18761586312013. The next prime is 18761586312037. The reversal of 18761586312020 is 2021368516781.

It can be written as a sum of positive squares in 4 ways, for example, as 225220481476 + 18536365830544 = 474574^2 + 4305388^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 18761586312020.

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, 52327739 + ... + 52685058.

It is an arithmetic number, because the mean of its divisors is an integer number (1641822590331).

Almost surely, 2^{18761586312020} is an apocalyptic number.

18761586312020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18761586312020 is an abundant number, since it is smaller than the sum of its proper divisors (20642155855924).

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

18761586312020 is a wasteful number, since it uses less digits than its factorization.

18761586312020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105021739 (or 105021737 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 50.

The spelling of 18761586312020 in words is "eighteen trillion, seven hundred sixty-one billion, five hundred eighty-six million, three hundred twelve thousand, twenty".