20196499137984 has 112 divisors (see below), whose sum is σ = 63941195703840. Its totient is φ = 6214307420160.

The previous prime is 20196499137931. The next prime is 20196499138001. The reversal of 20196499137984 is 48973199469102.

20196499137984 is a `hidden beast` number, since 2 + 0 + 1 + 96 + 4 + 9 + 91 + 379 + 84 = 666.

It is a Smith number, since the sum of its digits (72) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

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, 449507877 + ... + 449552804.

It is an arithmetic number, because the mean of its divisors is an integer number (570903533070).

Almost surely, 2^{20196499137984} is an apocalyptic number.

20196499137984 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20196499137984 is an abundant number, since it is smaller than the sum of its proper divisors (43744696565856).

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

20196499137984 is a wasteful number, since it uses less digits than its factorization.

20196499137984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 899060715 (or 899060699 counting only the distinct ones).

The product of its (nonzero) digits is 211631616, while the sum is 72.

The spelling of 20196499137984 in words is "twenty trillion, one hundred ninety-six billion, four hundred ninety-nine million, one hundred thirty-seven thousand, nine hundred eighty-four".