21005416022 has 8 divisors (see below), whose sum is σ = 31593978336. Its totient is φ = 10474089912.

The previous prime is 21005416013. The next prime is 21005416037. The reversal of 21005416022 is 22061450012.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14308133 + ... + 14309600.

It is an arithmetic number, because the mean of its divisors is an integer number (3949247292).

Almost surely, 2^21005416022 is an apocalyptic number.

21005416022 is a deficient number, since it is larger than the sum of its proper divisors (10588562314).

21005416022 is a wasteful number, since it uses less digits than its factorization.

21005416022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28618102.

The product of its (nonzero) digits is 960, while the sum is 23.

Adding to 21005416022 its reverse (22061450012), we get a palindrome (43066866034).

The spelling of 21005416022 in words is "twenty-one billion, five million, four hundred sixteen thousand, twenty-two".