21146264113 has 8 divisors (see below), whose sum is σ = 24112482408. Its totient is φ = 18371414784.

The previous prime is 21146264093. The next prime is 21146264137. The reversal of 21146264113 is 31146264112.

It can be written as a sum of positive squares in 4 ways, for example, as 20223009 + 21126041104 = 4497^2 + 145348^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21146264113 - 2⁹ = 21146263601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21146244113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47842006 + ... + 47842447.

It is an arithmetic number, because the mean of its divisors is an integer number (3014060301).

Almost surely, 2^21146264113 is an apocalyptic number.

It is an amenable number.

21146264113 is a deficient number, since it is larger than the sum of its proper divisors (2966218295).

21146264113 is a wasteful number, since it uses less digits than its factorization.

21146264113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95684483.

The product of its digits is 6912, while the sum is 31.

Subtracting 21146264113 from its reverse (31146264112), we obtain a palindrome (9999999999).

The spelling of 21146264113 in words is "twenty-one billion, one hundred forty-six million, two hundred sixty-four thousand, one hundred thirteen".