21020220282 has 32 divisors (see below), whose sum is σ = 45949330944. Its totient is φ = 6381849600.

The previous prime is 21020220281. The next prime is 21020220301. The reversal of 21020220282 is 28202202012.

It is a super-3 number, since 3×21020220282³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (21020220281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3320719 + ... + 3327042.

It is an arithmetic number, because the mean of its divisors is an integer number (1435916592).

Almost surely, 2^21020220282 is an apocalyptic number.

21020220282 is an abundant number, since it is smaller than the sum of its proper divisors (24929110662).

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

21020220282 is a wasteful number, since it uses less digits than its factorization.

21020220282 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6647814.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 21020220282 its reverse (28202202012), we get a palindrome (49222422294).

The spelling of 21020220282 in words is "twenty-one billion, twenty million, two hundred twenty thousand, two hundred eighty-two".