20286471912 has 128 divisors (see below), whose sum is σ = 61267430400. Its totient is φ = 5468083200.

The previous prime is 20286471871. The next prime is 20286471917. The reversal of 20286471912 is 21917468202.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (20286471917) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 756087 + ... + 782457.

It is an arithmetic number, because the mean of its divisors is an integer number (478651800).

Almost surely, 2^20286471912 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20286471912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30633715200).

20286471912 is an abundant number, since it is smaller than the sum of its proper divisors (40980958488).

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

20286471912 is a wasteful number, since it uses less digits than its factorization.

20286471912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26647 (or 26643 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 42.

The spelling of 20286471912 in words is "twenty billion, two hundred eighty-six million, four hundred seventy-one thousand, nine hundred twelve".