20351634343232 has 56 divisors (see below), whose sum is σ = 40805486559552. Its totient is φ = 10070073216000.

The previous prime is 20351634343211. The next prime is 20351634343237. The reversal of 20351634343232 is 23234343615302.

It is a self number, because there is not a number n which added to its sum of digits gives 20351634343232.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20351634343237) 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, 8501132 + ... + 10628852.

Almost surely, 2^{20351634343232} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20351634343232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20402743279776).

20351634343232 is an abundant number, since it is smaller than the sum of its proper divisors (20453852216320).

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

20351634343232 is a wasteful number, since it uses less digits than its factorization.

20351634343232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2129287 (or 2129277 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 41.

Adding to 20351634343232 its reverse (23234343615302), we get a palindrome (43585977958534).

The spelling of 20351634343232 in words is "twenty trillion, three hundred fifty-one billion, six hundred thirty-four million, three hundred forty-three thousand, two hundred thirty-two".