20784304283256 has 256 divisors, whose sum is σ = 59963905152000. Its totient is φ = 6750366626304.

The previous prime is 20784304283227. The next prime is 20784304283273. The reversal of 20784304283256 is 65238240348702.

20784304283256 is a `hidden beast` number, since 2 + 0 + 7 + 8 + 4 + 304 + 2 + 8 + 325 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 116556741 + ... + 116734923.

It is an arithmetic number, because the mean of its divisors is an integer number (234234004500).

Almost surely, 2^{20784304283256} 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 20784304283256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29981952576000).

20784304283256 is an abundant number, since it is smaller than the sum of its proper divisors (39179600868744).

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

20784304283256 is a wasteful number, since it uses less digits than its factorization.

20784304283256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178382 (or 178360 counting only the distinct ones).

The product of its (nonzero) digits is 15482880, while the sum is 54.

The spelling of 20784304283256 in words is "twenty trillion, seven hundred eighty-four billion, three hundred four million, two hundred eighty-three thousand, two hundred fifty-six".