21421323035 has 8 divisors (see below), whose sum is σ = 29377814496. Its totient is φ = 14688907200.

The previous prime is 21421323017. The next prime is 21421323037. The reversal of 21421323035 is 53032312412.

It is a happy number.

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

It is not a de Polignac number, because 21421323035 - 2²⁰ = 21420274459 is a prime.

It is a super-2 number, since 2×21421323035² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21421322995 and 21421323013.

It is not an unprimeable number, because it can be changed into a prime (21421323037) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 306018866 + ... + 306018935.

It is an arithmetic number, because the mean of its divisors is an integer number (3672226812).

Almost surely, 2^21421323035 is an apocalyptic number.

21421323035 is a deficient number, since it is larger than the sum of its proper divisors (7956491461).

21421323035 is an equidigital number, since it uses as much as digits as its factorization.

21421323035 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612037813.

The product of its (nonzero) digits is 4320, while the sum is 26.

Adding to 21421323035 its reverse (53032312412), we get a palindrome (74453635447).

The spelling of 21421323035 in words is "twenty-one billion, four hundred twenty-one million, three hundred twenty-three thousand, thirty-five".