21474895582 has 32 divisors (see below), whose sum is σ = 37140848640. Its totient is φ = 9121986720.

The previous prime is 21474895573. The next prime is 21474895627. The reversal of 21474895582 is 28559847412.

It is a super-2 number, since 2×21474895582² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1966357 + ... + 1977247.

It is an arithmetic number, because the mean of its divisors is an integer number (1160651520).

Almost surely, 2^21474895582 is an apocalyptic number.

21474895582 is a deficient number, since it is larger than the sum of its proper divisors (15665953058).

21474895582 is a wasteful number, since it uses less digits than its factorization.

21474895582 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12136.

The product of its digits is 6451200, while the sum is 55.

The spelling of 21474895582 in words is "twenty-one billion, four hundred seventy-four million, eight hundred ninety-five thousand, five hundred eighty-two".