21043402282 has 16 divisors (see below), whose sum is σ = 37642856832. Its totient is φ = 8626487760.

The previous prime is 21043402279. The next prime is 21043402283. The reversal of 21043402282 is 28220434012.

It is a self number, because there is not a number n which added to its sum of digits gives 21043402282.

It is not an unprimeable number, because it can be changed into a prime (21043402283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32675769 + ... + 32676412.

It is an arithmetic number, because the mean of its divisors is an integer number (2352678552).

Almost surely, 2^21043402282 is an apocalyptic number.

21043402282 is a deficient number, since it is larger than the sum of its proper divisors (16599454550).

21043402282 is a wasteful number, since it uses less digits than its factorization.

21043402282 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65352213.

The product of its (nonzero) digits is 6144, while the sum is 28.

Adding to 21043402282 its reverse (28220434012), we get a palindrome (49263836294).

The spelling of 21043402282 in words is "twenty-one billion, forty-three million, four hundred two thousand, two hundred eighty-two".