19806548916420 has 144 divisors (see below), whose sum is σ = 69788321261568. Its totient is φ = 4452994586880.

The previous prime is 19806548916419. The next prime is 19806548916431. The reversal of 19806548916420 is 2461984560891.

19806548916420 is a `hidden beast` number, since 1 + 9 + 8 + 0 + 6 + 548 + 9 + 1 + 64 + 20 = 666.

It is a super-2 number, since 2×19806548916420² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 128771364 + ... + 128925083.

It is an arithmetic number, because the mean of its divisors is an integer number (484641119872).

Almost surely, 2^{19806548916420} is an apocalyptic number.

19806548916420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19806548916420 is an abundant number, since it is smaller than the sum of its proper divisors (49981772345148).

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

19806548916420 is a wasteful number, since it uses less digits than its factorization.

19806548916420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257696530 (or 257696525 counting only the distinct ones).

The product of its (nonzero) digits is 29859840, while the sum is 63.

The spelling of 19806548916420 in words is "nineteen trillion, eight hundred six billion, five hundred forty-eight million, nine hundred sixteen thousand, four hundred twenty".