21415200105 has 64 divisors (see below), whose sum is σ = 38884285440. Its totient is φ = 9977147136.

The previous prime is 21415200071. The next prime is 21415200137. The reversal of 21415200105 is 50100251412.

It is not a de Polignac number, because 21415200105 - 2⁶ = 21415200041 is a prime.

It is a super-2 number, since 2×21415200105² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4158142 + ... + 4163288.

It is an arithmetic number, because the mean of its divisors is an integer number (607566960).

Almost surely, 2^21415200105 is an apocalyptic number.

It is an amenable number.

21415200105 is a deficient number, since it is larger than the sum of its proper divisors (17469085335).

21415200105 is a wasteful number, since it uses less digits than its factorization.

21415200105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6310.

The product of its (nonzero) digits is 400, while the sum is 21.

Adding to 21415200105 its reverse (50100251412), we get a palindrome (71515451517).

The spelling of 21415200105 in words is "twenty-one billion, four hundred fifteen million, two hundred thousand, one hundred five".