21111760868 has 24 divisors (see below), whose sum is σ = 40358871840. Its totient is φ = 9583254720.

The previous prime is 21111760867. The next prime is 21111760919. The reversal of 21111760868 is 86806711112.

It is a super-2 number, since 2×21111760868² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21111760861) 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, 292121 + ... + 357152.

It is an arithmetic number, because the mean of its divisors is an integer number (1681619660).

Almost surely, 2^21111760868 is an apocalyptic number.

It is an amenable number.

21111760868 is a deficient number, since it is larger than the sum of its proper divisors (19247110972).

21111760868 is a wasteful number, since it uses less digits than its factorization.

21111760868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 650027 (or 650025 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 41.

The spelling of 21111760868 in words is "twenty-one billion, one hundred eleven million, seven hundred sixty thousand, eight hundred sixty-eight".