21004916219196 has 144 divisors (see below), whose sum is σ = 60671191440384. Its totient is φ = 5538119378688.

The previous prime is 21004916219113. The next prime is 21004916219227. The reversal of 21004916219196 is 69191261940012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 48148626 + ... + 48582918.

It is an arithmetic number, because the mean of its divisors is an integer number (421327718336).

Almost surely, 2^{21004916219196} is an apocalyptic number.

21004916219196 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21004916219196, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30335595720192).

21004916219196 is an abundant number, since it is smaller than the sum of its proper divisors (39666275221188).

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

21004916219196 is a wasteful number, since it uses less digits than its factorization.

21004916219196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437740 (or 437725 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 51.

The spelling of 21004916219196 in words is "twenty-one trillion, four billion, nine hundred sixteen million, two hundred nineteen thousand, one hundred ninety-six".