21082415582 has 16 divisors (see below), whose sum is σ = 32826124800. Its totient is φ = 10144173720.

The previous prime is 21082415579. The next prime is 21082415587. The reversal of 21082415582 is 28551428012.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21082415587) 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, 938732 + ... + 960927.

It is an arithmetic number, because the mean of its divisors is an integer number (2051632800).

Almost surely, 2^21082415582 is an apocalyptic number.

21082415582 is a deficient number, since it is larger than the sum of its proper divisors (11743709218).

21082415582 is a wasteful number, since it uses less digits than its factorization.

21082415582 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1899871.

The product of its (nonzero) digits is 51200, while the sum is 38.

The spelling of 21082415582 in words is "twenty-one billion, eighty-two million, four hundred fifteen thousand, five hundred eighty-two".