21790701316 has 18 divisors (see below), whose sum is σ = 38711414238. Its totient is φ = 10732724640.

The previous prime is 21790701307. The next prime is 21790701341. The reversal of 21790701316 is 61310709712.

It can be written as a sum of positive squares in only one way, i.e., 14063588100 + 7727113216 = 118590^2 + 87904^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 588825 + ... + 624736.

Almost surely, 2^21790701316 is an apocalyptic number.

It is an amenable number.

21790701316 is a deficient number, since it is larger than the sum of its proper divisors (16920712922).

21790701316 is a wasteful number, since it uses less digits than its factorization.

21790701316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1213699 (or 1213630 counting only the distinct ones).

The product of its (nonzero) digits is 15876, while the sum is 37.

The spelling of 21790701316 in words is "twenty-one billion, seven hundred ninety million, seven hundred one thousand, three hundred sixteen".