21656216630362 has 16 divisors (see below), whose sum is σ = 33045306964992. Its totient is φ = 10641860792640.

The previous prime is 21656216630333. The next prime is 21656216630413. The reversal of 21656216630362 is 26303661265612.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 186562714 + ... + 186678757.

It is an arithmetic number, because the mean of its divisors is an integer number (2065331685312).

Almost surely, 2^{21656216630362} is an apocalyptic number.

21656216630362 is a deficient number, since it is larger than the sum of its proper divisors (11389090334630).

21656216630362 is a wasteful number, since it uses less digits than its factorization.

21656216630362 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373241973.

The product of its (nonzero) digits is 2799360, while the sum is 49.

Adding to 21656216630362 its reverse (26303661265612), we get a palindrome (47959877895974).

The spelling of 21656216630362 in words is "twenty-one trillion, six hundred fifty-six billion, two hundred sixteen million, six hundred thirty thousand, three hundred sixty-two".