20545208895 has 32 divisors (see below), whose sum is σ = 33300748800. Its totient is φ = 10815410304.

The previous prime is 20545208851. The next prime is 20545208911. The reversal of 20545208895 is 59880254502.

It is a Cunningham number, because it is equal to 143336²-1.

It is not a de Polignac number, because 20545208895 - 2⁷ = 20545208767 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 406116 + ... + 453894.

It is an arithmetic number, because the mean of its divisors is an integer number (1040648400).

Almost surely, 2^20545208895 is an apocalyptic number.

20545208895 is a deficient number, since it is larger than the sum of its proper divisors (12755539905).

20545208895 is a wasteful number, since it uses less digits than its factorization.

20545208895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48159.

The product of its (nonzero) digits is 1152000, while the sum is 48.

The spelling of 20545208895 in words is "twenty billion, five hundred forty-five million, two hundred eight thousand, eight hundred ninety-five".