20703776730 has 256 divisors, whose sum is σ = 62635991040. Its totient is φ = 4263662592.

The previous prime is 20703776713. The next prime is 20703776747. The reversal of 20703776730 is 3767730702.

It is an interprime number because it is at equal distance from previous prime (20703776713) and next prime (20703776747).

It is a Harshad number since it is a multiple of its sum of digits (42).

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 127 ways as a sum of consecutive naturals, for example, 27864739 + ... + 27865481.

It is an arithmetic number, because the mean of its divisors is an integer number (244671840).

Almost surely, 2^20703776730 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20703776730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31317995520).

20703776730 is an abundant number, since it is smaller than the sum of its proper divisors (41932214310).

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

20703776730 is a wasteful number, since it uses less digits than its factorization.

20703776730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1005.

The product of its (nonzero) digits is 259308, while the sum is 42.

The spelling of 20703776730 in words is "twenty billion, seven hundred three million, seven hundred seventy-six thousand, seven hundred thirty".