20135700011621 has 8 divisors (see below), whose sum is σ = 20264021452800. Its totient is φ = 20007554476320.

The previous prime is 20135700011597. The next prime is 20135700011633. The reversal of 20135700011621 is 12611000753102.

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 20135700011621 - 2¹⁴ = 20135699995237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20135700001621) 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, 43746800 + ... + 44204681.

It is an arithmetic number, because the mean of its divisors is an integer number (2533002681600).

Almost surely, 2^{20135700011621} is an apocalyptic number.

It is an amenable number.

20135700011621 is a deficient number, since it is larger than the sum of its proper divisors (128321441179).

20135700011621 is a wasteful number, since it uses less digits than its factorization.

20135700011621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87952939.

The product of its (nonzero) digits is 2520, while the sum is 29.

Adding to 20135700011621 its reverse (12611000753102), we get a palindrome (32746700764723).

The spelling of 20135700011621 in words is "twenty trillion, one hundred thirty-five billion, seven hundred million, eleven thousand, six hundred twenty-one".