21049338966 has 8 divisors (see below), whose sum is σ = 42098677944. Its totient is φ = 7016446320.

The previous prime is 21049338941. The next prime is 21049338983. The reversal of 21049338966 is 66983394012.

It is a sphenic number, since it is the product of 3 distinct primes.

21049338966 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1754111575 + ... + 1754111586.

It is an arithmetic number, because the mean of its divisors is an integer number (5262334743).

Almost surely, 2^21049338966 is an apocalyptic number.

21049338966 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21049338966 is a wasteful number, since it uses less digits than its factorization.

21049338966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3508223166.

The product of its (nonzero) digits is 1679616, while the sum is 51.

The spelling of 21049338966 in words is "twenty-one billion, forty-nine million, three hundred thirty-eight thousand, nine hundred sixty-six".