21766710022 has 4 divisors (see below), whose sum is σ = 32650065036. Its totient is φ = 10883355010.

The previous prime is 21766710011. The next prime is 21766710041. The reversal of 21766710022 is 22001766712.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21766710022.

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, 5441677504 + ... + 5441677507.

It is an arithmetic number, because the mean of its divisors is an integer number (8162516259).

Almost surely, 2^21766710022 is an apocalyptic number.

21766710022 is a deficient number, since it is larger than the sum of its proper divisors (10883355014).

21766710022 is a wasteful number, since it uses less digits than its factorization.

21766710022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10883355013.

The product of its (nonzero) digits is 14112, while the sum is 34.

The spelling of 21766710022 in words is "twenty-one billion, seven hundred sixty-six million, seven hundred ten thousand, twenty-two".