20541235677 has 16 divisors (see below), whose sum is σ = 29004256512. Its totient is φ = 12886456320.

The previous prime is 20541235657. The next prime is 20541235679. The reversal of 20541235677 is 77653214502.

It is not a de Polignac number, because 20541235677 - 2⁷ = 20541235549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20541235679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 306477 + ... + 367437.

It is an arithmetic number, because the mean of its divisors is an integer number (1812766032).

Almost surely, 2^20541235677 is an apocalyptic number.

It is an amenable number.

20541235677 is a deficient number, since it is larger than the sum of its proper divisors (8463020835).

20541235677 is a wasteful number, since it uses less digits than its factorization.

20541235677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67588.

The product of its (nonzero) digits is 352800, while the sum is 42.

The spelling of 20541235677 in words is "twenty billion, five hundred forty-one million, two hundred thirty-five thousand, six hundred seventy-seven".