21110292827 has 16 divisors (see below), whose sum is σ = 24086849472. Its totient is φ = 18328442880.

The previous prime is 21110292823. The next prime is 21110292829. The reversal of 21110292827 is 72829201112.

It is a cyclic number.

It is not a de Polignac number, because 21110292827 - 2² = 21110292823 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21110292823) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 325427 + ... + 384867.

It is an arithmetic number, because the mean of its divisors is an integer number (1505428092).

Almost surely, 2^21110292827 is an apocalyptic number.

21110292827 is a deficient number, since it is larger than the sum of its proper divisors (2976556645).

21110292827 is a wasteful number, since it uses less digits than its factorization.

21110292827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61078.

The product of its (nonzero) digits is 8064, while the sum is 35.

Adding to 21110292827 its reverse (72829201112), we get a palindrome (93939493939).

The spelling of 21110292827 in words is "twenty-one billion, one hundred ten million, two hundred ninety-two thousand, eight hundred twenty-seven".