21943369186 has 16 divisors (see below), whose sum is σ = 33554805984. Its totient is φ = 10760364064.

The previous prime is 21943369159. The next prime is 21943369229. The reversal of 21943369186 is 68196334912.

It is a happy number.

It is a super-2 number, since 2×21943369186² (a number of 21 digits) contains 22 as substring.

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, 459700 + ... + 505183.

It is an arithmetic number, because the mean of its divisors is an integer number (2097175374).

Almost surely, 2^21943369186 is an apocalyptic number.

21943369186 is a deficient number, since it is larger than the sum of its proper divisors (11611436798).

21943369186 is a wasteful number, since it uses less digits than its factorization.

21943369186 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 965105.

The product of its digits is 1679616, while the sum is 52.

The spelling of 21943369186 in words is "twenty-one billion, nine hundred forty-three million, three hundred sixty-nine thousand, one hundred eighty-six".