20678967210 has 64 divisors (see below), whose sum is σ = 54208756224. Its totient is φ = 5006836800.

The previous prime is 20678967209. The next prime is 20678967247. The reversal of 20678967210 is 1276987602.

It is a self number, because there is not a number n which added to its sum of digits gives 20678967210.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 228997 + ... + 306263.

It is an arithmetic number, because the mean of its divisors is an integer number (847011816).

Almost surely, 2^20678967210 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20678967210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27104378112).

20678967210 is an abundant number, since it is smaller than the sum of its proper divisors (33529789014).

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

20678967210 is a wasteful number, since it uses less digits than its factorization.

20678967210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78099.

The product of its (nonzero) digits is 508032, while the sum is 48.

The spelling of 20678967210 in words is "twenty billion, six hundred seventy-eight million, nine hundred sixty-seven thousand, two hundred ten".