20135630564461 has 16 divisors (see below), whose sum is σ = 21359795479344. Its totient is φ = 18915897775104.

The previous prime is 20135630564459. The next prime is 20135630564531. The reversal of 20135630564461 is 16446503653102.

It can be written as a sum of positive squares in 8 ways, for example, as 363325645225 + 19772304919236 = 602765^2 + 4446606^2 .

It is a cyclic number.

It is not a de Polignac number, because 20135630564461 - 2¹ = 20135630564459 is a prime.

It is a super-3 number, since 3×20135630564461³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20135630564261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33415111 + ... + 34012363.

It is an arithmetic number, because the mean of its divisors is an integer number (1334987217459).

Almost surely, 2^{20135630564461} is an apocalyptic number.

It is an amenable number.

20135630564461 is a deficient number, since it is larger than the sum of its proper divisors (1224164914883).

20135630564461 is a wasteful number, since it uses less digits than its factorization.

20135630564461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 600960.

The product of its (nonzero) digits is 1555200, while the sum is 46.

The spelling of 20135630564461 in words is "twenty trillion, one hundred thirty-five billion, six hundred thirty million, five hundred sixty-four thousand, four hundred sixty-one".