21927118886 has 4 divisors (see below), whose sum is σ = 32890678332. Its totient is φ = 10963559442.

The previous prime is 21927118883. The next prime is 21927118903. The reversal of 21927118886 is 68881172912.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21927118883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5481779720 + ... + 5481779723.

It is an arithmetic number, because the mean of its divisors is an integer number (8222669583).

Almost surely, 2^21927118886 is an apocalyptic number.

21927118886 is a deficient number, since it is larger than the sum of its proper divisors (10963559446).

21927118886 is a wasteful number, since it uses less digits than its factorization.

21927118886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10963559445.

The product of its digits is 774144, while the sum is 53.

The spelling of 21927118886 in words is "twenty-one billion, nine hundred twenty-seven million, one hundred eighteen thousand, eight hundred eighty-six".