20211301782 has 96 divisors (see below), whose sum is σ = 51509323008. Its totient is φ = 5607499968.

The previous prime is 20211301771. The next prime is 20211301861. The reversal of 20211301782 is 28710311202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 926533 + ... + 948095.

It is an arithmetic number, because the mean of its divisors is an integer number (536555448).

Almost surely, 2^20211301782 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20211301782, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25754661504).

20211301782 is an abundant number, since it is smaller than the sum of its proper divisors (31298021226).

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

20211301782 is a wasteful number, since it uses less digits than its factorization.

20211301782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21794 (or 21791 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

Adding to 20211301782 its reverse (28710311202), we get a palindrome (48921612984).

The spelling of 20211301782 in words is "twenty billion, two hundred eleven million, three hundred one thousand, seven hundred eighty-two".