21718060790 has 8 divisors (see below), whose sum is σ = 39092509440. Its totient is φ = 8687224312.

The previous prime is 21718060781. The next prime is 21718060801. The reversal of 21718060790 is 9706081712.

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

It is a Curzon 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, 1085903030 + ... + 1085903049.

It is an arithmetic number, because the mean of its divisors is an integer number (4886563680).

Almost surely, 2^21718060790 is an apocalyptic number.

21718060790 is a deficient number, since it is larger than the sum of its proper divisors (17374448650).

21718060790 is a wasteful number, since it uses less digits than its factorization.

21718060790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2171806086.

The product of its (nonzero) digits is 42336, while the sum is 41.

The spelling of 21718060790 in words is "twenty-one billion, seven hundred eighteen million, sixty thousand, seven hundred ninety".