21164351410 has 8 divisors (see below), whose sum is σ = 38095832556. Its totient is φ = 8465740560.

The previous prime is 21164351401. The next prime is 21164351431. The reversal of 21164351410 is 1415346112.

It can be written as a sum of positive squares in 2 ways, for example, as 21163557529 + 793881 = 145477^2 + 891^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1058217561 + ... + 1058217580.

Almost surely, 2^21164351410 is an apocalyptic number.

21164351410 is a deficient number, since it is larger than the sum of its proper divisors (16931481146).

21164351410 is a wasteful number, since it uses less digits than its factorization.

21164351410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2116435148.

The product of its (nonzero) digits is 2880, while the sum is 28.

Adding to 21164351410 its reverse (1415346112), we get a palindrome (22579697522).

The spelling of 21164351410 in words is "twenty-one billion, one hundred sixty-four million, three hundred fifty-one thousand, four hundred ten".