21023110982 has 8 divisors (see below), whose sum is σ = 31539502776. Its totient is φ = 10509943392.

The previous prime is 21023110981. The next prime is 21023111009. The reversal of 21023110982 is 28901132012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21023110982² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21023110981) 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 3 ways as a sum of consecutive naturals, for example, 789683 + ... + 815870.

It is an arithmetic number, because the mean of its divisors is an integer number (3942437847).

Almost surely, 2^21023110982 is an apocalyptic number.

21023110982 is a deficient number, since it is larger than the sum of its proper divisors (10516391794).

21023110982 is a wasteful number, since it uses less digits than its factorization.

21023110982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1612102.

The product of its (nonzero) digits is 1728, while the sum is 29.

Adding to 21023110982 its reverse (28901132012), we get a palindrome (49924242994).

The spelling of 21023110982 in words is "twenty-one billion, twenty-three million, one hundred ten thousand, nine hundred eighty-two".