20535323406 has 64 divisors (see below), whose sum is σ = 45101904960. Its totient is φ = 6194672640.

The previous prime is 20535323387. The next prime is 20535323407. The reversal of 20535323406 is 60432353502.

It is a super-2 number, since 2×20535323406² (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 (20535323407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1482360 + ... + 1496148.

It is an arithmetic number, because the mean of its divisors is an integer number (704717265).

Almost surely, 2^20535323406 is an apocalyptic number.

20535323406 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 20535323406, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22550952480).

20535323406 is an abundant number, since it is smaller than the sum of its proper divisors (24566581554).

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

20535323406 is a wasteful number, since it uses less digits than its factorization.

20535323406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14181.

The product of its (nonzero) digits is 64800, while the sum is 33.

Adding to 20535323406 its reverse (60432353502), we get a palindrome (80967676908).

The spelling of 20535323406 in words is "twenty billion, five hundred thirty-five million, three hundred twenty-three thousand, four hundred six".