21130442162 has 16 divisors (see below), whose sum is σ = 33656847840. Its totient is φ = 9915075648.

The previous prime is 21130442159. The next prime is 21130442237. The reversal of 21130442162 is 26124403112.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 883712 + ... + 907307.

It is an arithmetic number, because the mean of its divisors is an integer number (2103552990).

Almost surely, 2^21130442162 is an apocalyptic number.

21130442162 is a deficient number, since it is larger than the sum of its proper divisors (12526405678).

21130442162 is a wasteful number, since it uses less digits than its factorization.

21130442162 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1791385.

The product of its (nonzero) digits is 2304, while the sum is 26.

Adding to 21130442162 its reverse (26124403112), we get a palindrome (47254845274).

The spelling of 21130442162 in words is "twenty-one billion, one hundred thirty million, four hundred forty-two thousand, one hundred sixty-two".