21010507373283 has 64 divisors (see below), whose sum is σ = 28783232755200. Its totient is φ = 13628360678400.

The previous prime is 21010507373269. The next prime is 21010507373287. The reversal of 21010507373283 is 38237370501012.

It is a Cunningham number, because it is equal to 4583722²-1.

It is not a de Polignac number, because 21010507373283 - 2⁴ = 21010507373267 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21010507373287) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6091766143 + ... + 6091769591.

It is an arithmetic number, because the mean of its divisors is an integer number (449738011800).

Almost surely, 2^{21010507373283} is an apocalyptic number.

21010507373283 is a deficient number, since it is larger than the sum of its proper divisors (7772725381917).

21010507373283 is a wasteful number, since it uses less digits than its factorization.

21010507373283 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4580.

The product of its (nonzero) digits is 211680, while the sum is 42.

Adding to 21010507373283 its reverse (38237370501012), we get a palindrome (59247877874295).

The spelling of 21010507373283 in words is "twenty-one trillion, ten billion, five hundred seven million, three hundred seventy-three thousand, two hundred eighty-three".