21519838340700 has 216 divisors, whose sum is σ = 72909301256064. Its totient is φ = 4886244720000.

The previous prime is 21519838340677. The next prime is 21519838340713. The reversal of 21519838340700 is 704383891512.

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 71 ways as a sum of consecutive naturals, for example, 2627766 + ... + 7067165.

Almost surely, 2^{21519838340700} is an apocalyptic number.

21519838340700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21519838340700 is an abundant number, since it is smaller than the sum of its proper divisors (51389462915364).

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

21519838340700 is a wasteful number, since it uses less digits than its factorization.

21519838340700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9695113 (or 9695099 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 51.

The spelling of 21519838340700 in words is "twenty-one trillion, five hundred nineteen billion, eight hundred thirty-eight million, three hundred forty thousand, seven hundred".