20678868210 has 384 divisors, whose sum is σ = 68620898304. Its totient is φ = 3851504640.

The previous prime is 20678868157. The next prime is 20678868211. The reversal of 20678868210 is 1286887602.

It is a self number, because there is not a number n which added to its sum of digits gives 20678868210.

It is not an unprimeable number, because it can be changed into a prime (20678868211) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 41110819 + ... + 41111321.

It is an arithmetic number, because the mean of its divisors is an integer number (178700256).

Almost surely, 2^20678868210 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20678868210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34310449152).

20678868210 is an abundant number, since it is smaller than the sum of its proper divisors (47942030094).

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

20678868210 is a wasteful number, since it uses less digits than its factorization.

20678868210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 618 (or 581 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 48.

It can be divided in two parts, 20678 and 868210, that added together give a palindrome (888888).

The spelling of 20678868210 in words is "twenty billion, six hundred seventy-eight million, eight hundred sixty-eight thousand, two hundred ten".