21162107260636 has 12 divisors (see below), whose sum is σ = 37086517508040. Its totient is φ = 10565959401200.

The previous prime is 21162107260627. The next prime is 21162107260643. The reversal of 21162107260636 is 63606270126112.

It is a junction number, because it is equal to n+sod(n) for n = 21162107260592 and 21162107260601.

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, 3773554126 + ... + 3773559733.

It is an arithmetic number, because the mean of its divisors is an integer number (3090543125670).

Almost surely, 2^{21162107260636} is an apocalyptic number.

It is an amenable number.

21162107260636 is a deficient number, since it is larger than the sum of its proper divisors (15924410247404).

21162107260636 is a wasteful number, since it uses less digits than its factorization.

21162107260636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7547114564 (or 7547114562 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 43.

Adding to 21162107260636 its reverse (63606270126112), we get a palindrome (84768377386748).

The spelling of 21162107260636 in words is "twenty-one trillion, one hundred sixty-two billion, one hundred seven million, two hundred sixty thousand, six hundred thirty-six".