20668464270 has 96 divisors (see below), whose sum is σ = 54650419200. Its totient is φ = 5418608832.

The previous prime is 20668464259. The next prime is 20668464281. The reversal of 20668464270 is 7246486602.

It is an interprime number because it is at equal distance from previous prime (20668464259) and next prime (20668464281).

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1693209 + ... + 1705371.

It is an arithmetic number, because the mean of its divisors is an integer number (569275200).

Almost surely, 2^20668464270 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20668464270, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27325209600).

20668464270 is an abundant number, since it is smaller than the sum of its proper divisors (33981954930).

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

20668464270 is a wasteful number, since it uses less digits than its factorization.

20668464270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12494 (or 12491 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 45.

The spelling of 20668464270 in words is "twenty billion, six hundred sixty-eight million, four hundred sixty-four thousand, two hundred seventy".