21034211086 has 24 divisors (see below), whose sum is σ = 36773087616. Its totient is φ = 8997337440.

The previous prime is 21034211069. The next prime is 21034211087. The reversal of 21034211086 is 68011243012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21034211087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 154926 + ... + 257041.

It is an arithmetic number, because the mean of its divisors is an integer number (1532211984).

Almost surely, 2^21034211086 is an apocalyptic number.

21034211086 is a deficient number, since it is larger than the sum of its proper divisors (15738876530).

21034211086 is a wasteful number, since it uses less digits than its factorization.

21034211086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412504 (or 412497 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

Adding to 21034211086 its reverse (68011243012), we get a palindrome (89045454098).

The spelling of 21034211086 in words is "twenty-one billion, thirty-four million, two hundred eleven thousand, eighty-six".