20123334353502 has 144 divisors (see below), whose sum is σ = 47676507072480. Its totient is φ = 6128557894656.

The previous prime is 20123334353491. The next prime is 20123334353543. The reversal of 20123334353502 is 20535343332102.

20123334353502 is a `hidden beast` number, since 20 + 1 + 233 + 3 + 4 + 353 + 50 + 2 = 666.

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 71 ways as a sum of consecutive naturals, for example, 84377008 + ... + 84615164.

It is an arithmetic number, because the mean of its divisors is an integer number (331086854670).

Almost surely, 2^{20123334353502} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20123334353502, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23838253536240).

20123334353502 is an abundant number, since it is smaller than the sum of its proper divisors (27553172718978).

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

20123334353502 is a wasteful number, since it uses less digits than its factorization.

20123334353502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238675 (or 238655 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 36.

Adding to 20123334353502 its reverse (20535343332102), we get a palindrome (40658677685604).

The spelling of 20123334353502 in words is "twenty trillion, one hundred twenty-three billion, three hundred thirty-four million, three hundred fifty-three thousand, five hundred two".