21143688214 has 16 divisors (see below), whose sum is σ = 34601639616. Its totient is φ = 9609968200.

The previous prime is 21143688149. The next prime is 21143688263. The reversal of 21143688214 is 41288634112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 291849 + ... + 357019.

It is an arithmetic number, because the mean of its divisors is an integer number (2162602476).

Almost surely, 2^21143688214 is an apocalyptic number.

21143688214 is a deficient number, since it is larger than the sum of its proper divisors (13457951402).

21143688214 is a wasteful number, since it uses less digits than its factorization.

21143688214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79931.

The product of its digits is 73728, while the sum is 40.

The spelling of 21143688214 in words is "twenty-one billion, one hundred forty-three million, six hundred eighty-eight thousand, two hundred fourteen".