21199886662 has 4 divisors (see below), whose sum is σ = 31799829996. Its totient is φ = 10599943330.

The previous prime is 21199886629. The next prime is 21199886677. The reversal of 21199886662 is 26668899112.

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

It is a junction number, because it is equal to n+sod(n) for n = 21199886597 and 21199886606.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5299971664 + ... + 5299971667.

It is an arithmetic number, because the mean of its divisors is an integer number (7949957499).

Almost surely, 2^21199886662 is an apocalyptic number.

21199886662 is a deficient number, since it is larger than the sum of its proper divisors (10599943334).

21199886662 is a wasteful number, since it uses less digits than its factorization.

21199886662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10599943333.

The product of its digits is 4478976, while the sum is 58.

The spelling of 21199886662 in words is "twenty-one billion, one hundred ninety-nine million, eight hundred eighty-six thousand, six hundred sixty-two".