20860664832 has 880 divisors, whose sum is σ = 78625761280. Its totient is φ = 5374771200.

The previous prime is 20860664819. The next prime is 20860664941. The reversal of 20860664832 is 23846606802.

20860664832 is a `hidden beast` number, since 2 + 0 + 8 + 606 + 6 + 4 + 8 + 32 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 341978082 + ... + 341978142.

It is an arithmetic number, because the mean of its divisors is an integer number (89347456).

Almost surely, 2^20860664832 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 20860664832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39312880640).

20860664832 is an abundant number, since it is smaller than the sum of its proper divisors (57765096448).

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

20860664832 is a wasteful number, since it uses less digits than its factorization.

20860664832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150 (or 123 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 45.

The spelling of 20860664832 in words is "twenty billion, eight hundred sixty million, six hundred sixty-four thousand, eight hundred thirty-two".