20707970850 has 216 divisors, whose sum is σ = 64889583408. Its totient is φ = 4720766400.

The previous prime is 20707970849. The next prime is 20707970879. The reversal of 20707970850 is 5807970702.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 20707970796 and 20707970805.

It is an unprimeable number.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 10296345 + ... + 10298355.

It is an arithmetic number, because the mean of its divisors is an integer number (300414738).

Almost surely, 2^20707970850 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20707970850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32444791704).

20707970850 is an abundant number, since it is smaller than the sum of its proper divisors (44181612558).

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

20707970850 is a wasteful number, since it uses less digits than its factorization.

20707970850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2510 (or 2495 counting only the distinct ones).

The product of its (nonzero) digits is 246960, while the sum is 45.

The spelling of 20707970850 in words is "twenty billion, seven hundred seven million, nine hundred seventy thousand, eight hundred fifty".