20205516885 has 16 divisors (see below), whose sum is σ = 33117336000. Its totient is φ = 10513439360.

The previous prime is 20205516847. The next prime is 20205516931. The reversal of 20205516885 is 58861550202.

It is not a de Polignac number, because 20205516885 - 2⁷ = 20205516757 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16426635 + ... + 16427864.

It is an arithmetic number, because the mean of its divisors is an integer number (2069833500).

Almost surely, 2^20205516885 is an apocalyptic number.

It is an amenable number.

20205516885 is a deficient number, since it is larger than the sum of its proper divisors (12911819115).

20205516885 is a wasteful number, since it uses less digits than its factorization.

20205516885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32854548.

The product of its (nonzero) digits is 192000, while the sum is 42.

It can be divided in two parts, 202055168 and 85, that added together give a triangular number (202055253 = T₂₀₁₀₂).

The spelling of 20205516885 in words is "twenty billion, two hundred five million, five hundred sixteen thousand, eight hundred eighty-five".