20670650784 has 360 divisors, whose sum is σ = 69371134560. Its totient is φ = 5837739264.

The previous prime is 20670650779. The next prime is 20670650813. The reversal of 20670650784 is 48705607602.

20670650784 is a `hidden beast` number, since 2 + 0 + 67 + 0 + 6 + 507 + 84 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 115478407 + ... + 115478585.

It is an arithmetic number, because the mean of its divisors is an integer number (192697596).

Almost surely, 2^20670650784 is an apocalyptic number.

20670650784 is a gapful number since it is divisible by the number (24) 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 20670650784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34685567280).

20670650784 is an abundant number, since it is smaller than the sum of its proper divisors (48700483776).

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

20670650784 is a wasteful number, since it uses less digits than its factorization.

20670650784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390 (or 358 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 45.

The spelling of 20670650784 in words is "twenty billion, six hundred seventy million, six hundred fifty thousand, seven hundred eighty-four".