21162115698 has 16 divisors (see below), whose sum is σ = 42743284416. Its totient is φ = 6984196400.

The previous prime is 21162115687. The next prime is 21162115699. The reversal of 21162115698 is 89651126112.

It is not an unprimeable number, because it can be changed into a prime (21162115699) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 17459886 + ... + 17461097.

It is an arithmetic number, because the mean of its divisors is an integer number (2671455276).

Almost surely, 2^21162115698 is an apocalyptic number.

21162115698 is an abundant number, since it is smaller than the sum of its proper divisors (21581168718).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21162115698 is a wasteful number, since it uses less digits than its factorization.

21162115698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34921089.

The product of its digits is 51840, while the sum is 42.

The spelling of 21162115698 in words is "twenty-one billion, one hundred sixty-two million, one hundred fifteen thousand, six hundred ninety-eight".