20135745243651 has 8 divisors (see below), whose sum is σ = 27302705415360. Its totient is φ = 13196307617192.

The previous prime is 20135745243637. The next prime is 20135745243727. The reversal of 20135745243651 is 15634254753102.

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

It is a cyclic number.

It is not a de Polignac number, because 20135745243651 - 2¹¹ = 20135745241603 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20135745243651.

It is not an unprimeable number, because it can be changed into a prime (20135745243631) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 56880636105 + ... + 56880636458.

It is an arithmetic number, because the mean of its divisors is an integer number (3412838176920).

Almost surely, 2^{20135745243651} is an apocalyptic number.

20135745243651 is a deficient number, since it is larger than the sum of its proper divisors (7166960171709).

20135745243651 is a wasteful number, since it uses less digits than its factorization.

20135745243651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113761272625.

The product of its (nonzero) digits is 3024000, while the sum is 48.

Adding to 20135745243651 its reverse (15634254753102), we get a palindrome (35769999996753).

The spelling of 20135745243651 in words is "twenty trillion, one hundred thirty-five billion, seven hundred forty-five million, two hundred forty-three thousand, six hundred fifty-one".