20135154054761 has 8 divisors (see below), whose sum is σ = 20465333233800. Its totient is φ = 19804977930240.

The previous prime is 20135154054749. The next prime is 20135154054787. The reversal of 20135154054761 is 16745045153102.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1425203804761 + 18709950250000 = 1193819^2 + 4325500^2 .

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 20135154054761 - 2¹⁸ = 20135153792617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20135154054721) 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, 15263855 + ... + 16530443.

It is an arithmetic number, because the mean of its divisors is an integer number (2558166654225).

Almost surely, 2^{20135154054761} is an apocalyptic number.

It is an amenable number.

20135154054761 is a deficient number, since it is larger than the sum of its proper divisors (330179179039).

20135154054761 is a wasteful number, since it uses less digits than its factorization.

20135154054761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1527259.

The product of its (nonzero) digits is 504000, while the sum is 44.

The spelling of 20135154054761 in words is "twenty trillion, one hundred thirty-five billion, one hundred fifty-four million, fifty-four thousand, seven hundred sixty-one".