20419718780328 has 64 divisors (see below), whose sum is σ = 58638206309760. Its totient is φ = 5804590100736.

The previous prime is 20419718780309. The next prime is 20419718780347. The reversal of 20419718780328 is 82308781791402.

It is an interprime number because it is at equal distance from previous prime (20419718780309) and next prime (20419718780347).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 308459151 + ... + 308525342.

It is an arithmetic number, because the mean of its divisors is an integer number (916221973590).

Almost surely, 2^{20419718780328} is an apocalyptic number.

20419718780328 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20419718780328 is an abundant number, since it is smaller than the sum of its proper divisors (38218487529432).

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

20419718780328 is a wasteful number, since it uses less digits than its factorization.

20419718780328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 616984706 (or 616984702 counting only the distinct ones).

The product of its (nonzero) digits is 10838016, while the sum is 60.

The spelling of 20419718780328 in words is "twenty trillion, four hundred nineteen billion, seven hundred eighteen million, seven hundred eighty thousand, three hundred twenty-eight".