21301079536 has 40 divisors (see below), whose sum is σ = 46575255600. Its totient is φ = 9348433920.

The previous prime is 21301079489. The next prime is 21301079557. The reversal of 21301079536 is 63597010312.

It is a junction number, because it is equal to n+sod(n) for n = 21301079495 and 21301079504.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2081601 + ... + 2091808.

It is an arithmetic number, because the mean of its divisors is an integer number (1164381390).

Almost surely, 2^21301079536 is an apocalyptic number.

It is an amenable number.

21301079536 is an abundant number, since it is smaller than the sum of its proper divisors (25274176064).

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

21301079536 is a wasteful number, since it uses less digits than its factorization.

21301079536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4173457 (or 4173451 counting only the distinct ones).

The product of its (nonzero) digits is 34020, while the sum is 37.

Adding to 21301079536 its reverse (63597010312), we get a palindrome (84898089848).

The spelling of 21301079536 in words is "twenty-one billion, three hundred one million, seventy-nine thousand, five hundred thirty-six".