21014366105 has 12 divisors (see below), whose sum is σ = 25637436396. Its totient is φ = 16535880000.

The previous prime is 21014366089. The next prime is 21014366119. The reversal of 21014366105 is 50166341012.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 11342037001 + 9672329104 = 106499^2 + 98348^2 .

It is not a de Polignac number, because 21014366105 - 2⁴ = 21014366089 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 546146 + ... + 583355.

It is an arithmetic number, because the mean of its divisors is an integer number (2136453033).

Almost surely, 2^21014366105 is an apocalyptic number.

It is an amenable number.

21014366105 is a deficient number, since it is larger than the sum of its proper divisors (4623070291).

21014366105 is an equidigital number, since it uses as much as digits as its factorization.

21014366105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1129628 (or 1129567 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The spelling of 21014366105 in words is "twenty-one billion, fourteen million, three hundred sixty-six thousand, one hundred five".