20871466830 has 112 divisors (see below), whose sum is σ = 56469888720. Its totient is φ = 5551628544.

The previous prime is 20871466741. The next prime is 20871466843. The reversal of 20871466830 is 3866417802.

20871466830 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

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 (17) of ones.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 3051094 + ... + 3057926.

It is an arithmetic number, because the mean of its divisors is an integer number (504195435).

Almost surely, 2^20871466830 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20871466830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28234944360).

20871466830 is an abundant number, since it is smaller than the sum of its proper divisors (35598421890).

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

20871466830 is an equidigital number, since it uses as much as digits as its factorization.

20871466830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7277 (or 7262 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The spelling of 20871466830 in words is "twenty billion, eight hundred seventy-one million, four hundred sixty-six thousand, eight hundred thirty".