21336316435 has 16 divisors (see below), whose sum is σ = 29264332032. Its totient is φ = 14629068000.

The previous prime is 21336316423. The next prime is 21336316439. The reversal of 21336316435 is 53461363312.

It is not a de Polignac number, because 21336316435 - 2⁷ = 21336316307 is a prime.

It is a super-2 number, since 2×21336316435² (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 = 21336316394 and 21336316403.

It is not an unprimeable number, because it can be changed into a prime (21336316439) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 375660 + ... + 428710.

It is an arithmetic number, because the mean of its divisors is an integer number (1829020752).

Almost surely, 2^21336316435 is an apocalyptic number.

21336316435 is a deficient number, since it is larger than the sum of its proper divisors (7928015597).

21336316435 is a wasteful number, since it uses less digits than its factorization.

21336316435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64554.

The product of its digits is 116640, while the sum is 37.

Adding to 21336316435 its reverse (53461363312), we get a palindrome (74797679747).

The spelling of 21336316435 in words is "twenty-one billion, three hundred thirty-six million, three hundred sixteen thousand, four hundred thirty-five".