18938135254020 has 48 divisors (see below), whose sum is σ = 53116200023040. Its totient is φ = 5041653085696.

The previous prime is 18938135254007. The next prime is 18938135254037. The reversal of 18938135254020 is 2045253183981.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 266098980 + ... + 266170139.

It is an arithmetic number, because the mean of its divisors is an integer number (1106587500480).

Almost surely, 2^{18938135254020} is an apocalyptic number.

18938135254020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18938135254020 is an abundant number, since it is smaller than the sum of its proper divisors (34178064769020).

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

18938135254020 is a wasteful number, since it uses less digits than its factorization.

18938135254020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532269724 (or 532269722 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 51.

The spelling of 18938135254020 in words is "eighteen trillion, nine hundred thirty-eight billion, one hundred thirty-five million, two hundred fifty-four thousand, twenty".