20695966986240 has 2496 divisors, whose sum is σ = 94236575876352. Its totient is φ = 4076863488000.

The previous prime is 20695966986229. The next prime is 20695966986301. The reversal of 20695966986240 is 4268966959602.

20695966986240 is a `hidden beast` number, since 2 + 0 + 6 + 9 + 596 + 6 + 9 + 8 + 6 + 24 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (2496).

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 51610890040 + ... + 51610890440.

It is an arithmetic number, because the mean of its divisors is an integer number (37755038412).

Almost surely, 2^{20695966986240} is an apocalyptic number.

20695966986240 is a gapful number since it is divisible by the number (20) 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 20695966986240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47118287938176).

20695966986240 is an abundant number, since it is smaller than the sum of its proper divisors (73540608890112).

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

20695966986240 is a wasteful number, since it uses less digits than its factorization.

20695966986240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 654 (or 629 counting only the distinct ones).

The product of its (nonzero) digits is 604661760, while the sum is 72.

The spelling of 20695966986240 in words is "twenty trillion, six hundred ninety-five billion, nine hundred sixty-six million, nine hundred eighty-six thousand, two hundred forty".