21361050606 has 16 divisors (see below), whose sum is σ = 48825258624. Its totient is φ = 6103157304.

The previous prime is 21361050593. The next prime is 21361050629. The reversal of 21361050606 is 60605016312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 254298180 + ... + 254298263.

It is an arithmetic number, because the mean of its divisors is an integer number (3051578664).

Almost surely, 2^21361050606 is an apocalyptic number.

21361050606 is an abundant number, since it is smaller than the sum of its proper divisors (27464208018).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21361050606 is a wasteful number, since it uses less digits than its factorization.

21361050606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508596455.

The product of its (nonzero) digits is 6480, while the sum is 30.

Adding to 21361050606 its reverse (60605016312), we get a palindrome (81966066918).

The spelling of 21361050606 in words is "twenty-one billion, three hundred sixty-one million, fifty thousand, six hundred six".