21910245092053 has 16 divisors (see below), whose sum is σ = 22116847158000. Its totient is φ = 21704657103360.

The previous prime is 21910245091993. The next prime is 21910245092207. The reversal of 21910245092053 is 35029054201912.

It can be written as a sum of positive squares in 8 ways, for example, as 6711529598244 + 15198715493809 = 2590662^2 + 3898553^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21910245092053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21910245090053) 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, 79620663 + ... + 79895371.

It is an arithmetic number, because the mean of its divisors is an integer number (1382302947375).

Almost surely, 2^{21910245092053} is an apocalyptic number.

It is an amenable number.

21910245092053 is a deficient number, since it is larger than the sum of its proper divisors (206602065947).

21910245092053 is a wasteful number, since it uses less digits than its factorization.

21910245092053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276552.

The product of its (nonzero) digits is 194400, while the sum is 43.

Adding to 21910245092053 its reverse (35029054201912), we get a palindrome (56939299293965).

The spelling of 21910245092053 in words is "twenty-one trillion, nine hundred ten billion, two hundred forty-five million, ninety-two thousand, fifty-three".