20111882865 has 16 divisors (see below), whose sum is σ = 33217046016. Its totient is φ = 10380326400.

The previous prime is 20111882863. The next prime is 20111882899. The reversal of 20111882865 is 56828811102.

It is not a de Polignac number, because 20111882865 - 2¹ = 20111882863 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20111882863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21625216 + ... + 21626145.

It is an arithmetic number, because the mean of its divisors is an integer number (2076065376).

Almost surely, 2^20111882865 is an apocalyptic number.

It is an amenable number.

20111882865 is a deficient number, since it is larger than the sum of its proper divisors (13105163151).

20111882865 is a wasteful number, since it uses less digits than its factorization.

20111882865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43251400.

The product of its (nonzero) digits is 61440, while the sum is 42.

The spelling of 20111882865 in words is "twenty billion, one hundred eleven million, eight hundred eighty-two thousand, eight hundred sixty-five".