19887337120020 has 48 divisors (see below), whose sum is σ = 55685661470208. Its totient is φ = 5303183466880.

The previous prime is 19887337119971. The next prime is 19887337120069. The reversal of 19887337120020 is 2002173378891.

It is an interprime number because it is at equal distance from previous prime (19887337119971) and next prime (19887337120069).

It is a congruent number.

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, 288471 + ... + 6313310.

It is an arithmetic number, because the mean of its divisors is an integer number (1160117947296).

Almost surely, 2^{19887337120020} is an apocalyptic number.

19887337120020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19887337120020 is an abundant number, since it is smaller than the sum of its proper divisors (35798324350188).

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

19887337120020 is a wasteful number, since it uses less digits than its factorization.

19887337120020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6652000 (or 6651998 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 51.

The spelling of 19887337120020 in words is "nineteen trillion, eight hundred eighty-seven billion, three hundred thirty-seven million, one hundred twenty thousand, twenty".