21168231662 has 4 divisors (see below), whose sum is σ = 31752347496. Its totient is φ = 10584115830.

The previous prime is 21168231593. The next prime is 21168231671. The reversal of 21168231662 is 26613286112.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5292057914 + ... + 5292057917.

It is an arithmetic number, because the mean of its divisors is an integer number (7938086874).

Almost surely, 2^21168231662 is an apocalyptic number.

21168231662 is a deficient number, since it is larger than the sum of its proper divisors (10584115834).

21168231662 is a wasteful number, since it uses less digits than its factorization.

21168231662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10584115833.

The product of its digits is 41472, while the sum is 38.

The spelling of 21168231662 in words is "twenty-one billion, one hundred sixty-eight million, two hundred thirty-one thousand, six hundred sixty-two".