21309198662 has 8 divisors (see below), whose sum is σ = 31964421000. Its totient is φ = 10654391664.

The previous prime is 21309198661. The next prime is 21309198679. The reversal of 21309198662 is 26689190312.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21309198661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127589 + ... + 242687.

It is an arithmetic number, because the mean of its divisors is an integer number (3995552625).

Almost surely, 2^21309198662 is an apocalyptic number.

21309198662 is a deficient number, since it is larger than the sum of its proper divisors (10655222338).

21309198662 is a wasteful number, since it uses less digits than its factorization.

21309198662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207670.

The product of its (nonzero) digits is 279936, while the sum is 47.

The spelling of 21309198662 in words is "twenty-one billion, three hundred nine million, one hundred ninety-eight thousand, six hundred sixty-two".