18734783620128 has 48 divisors (see below), whose sum is σ = 49211615124000. Its totient is φ = 6240761762816.

The previous prime is 18734783620121. The next prime is 18734783620141. The reversal of 18734783620128 is 82102638743781.

It is a tau number, because it is divible by the number of its divisors (48).

It is not an unprimeable number, because it can be changed into a prime (18734783620121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64950825 + ... + 65238632.

It is an arithmetic number, because the mean of its divisors is an integer number (1025241981750).

Almost surely, 2^{18734783620128} is an apocalyptic number.

It is an amenable number.

18734783620128 is an abundant number, since it is smaller than the sum of its proper divisors (30476831503872).

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

18734783620128 is a wasteful number, since it uses less digits than its factorization.

18734783620128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130190969 (or 130190961 counting only the distinct ones).

The product of its (nonzero) digits is 21676032, while the sum is 60.

The spelling of 18734783620128 in words is "eighteen trillion, seven hundred thirty-four billion, seven hundred eighty-three million, six hundred twenty thousand, one hundred twenty-eight".