20605850496 has 640 divisors, whose sum is σ = 78056732160. Its totient is φ = 5240401920.

The previous prime is 20605850471. The next prime is 20605850513. The reversal of 20605850496 is 69405850602.

20605850496 is a `hidden beast` number, since 2 + 0 + 6 + 0 + 58 + 504 + 96 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 42311565 + ... + 42312051.

It is an arithmetic number, because the mean of its divisors is an integer number (121963644).

Almost surely, 2^20605850496 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20605850496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39028366080).

20605850496 is an abundant number, since it is smaller than the sum of its proper divisors (57450881664).

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

20605850496 is a wasteful number, since it uses less digits than its factorization.

20605850496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 584 (or 563 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 45.

The spelling of 20605850496 in words is "twenty billion, six hundred five million, eight hundred fifty thousand, four hundred ninety-six".