20541610577 has 8 divisors (see below), whose sum is σ = 20630853792. Its totient is φ = 20452482400.

The previous prime is 20541610547. The next prime is 20541610643. The reversal of 20541610577 is 77501614502.

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 20541610577 - 2²⁶ = 20474501713 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20541610577.

It is not an unprimeable number, because it can be changed into a prime (20541610517) 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, 339302 + ... + 395232.

It is an arithmetic number, because the mean of its divisors is an integer number (2578856724).

Almost surely, 2^20541610577 is an apocalyptic number.

It is an amenable number.

20541610577 is a deficient number, since it is larger than the sum of its proper divisors (89243215).

20541610577 is a wasteful number, since it uses less digits than its factorization.

20541610577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57519.

The product of its (nonzero) digits is 58800, while the sum is 38.

The spelling of 20541610577 in words is "twenty billion, five hundred forty-one million, six hundred ten thousand, five hundred seventy-seven".