21711430746 has 24 divisors (see below), whose sum is σ = 47059930164. Its totient is φ = 7234297920.

The previous prime is 21711430693. The next prime is 21711430781. The reversal of 21711430746 is 64703411712.

21711430746 is a `hidden beast` number, since 217 + 1 + 1 + 430 + 7 + 4 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 21710549025 + 881721 = 147345^2 + 939^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21711430746.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 189835 + ... + 281886.

Almost surely, 2^21711430746 is an apocalyptic number.

21711430746 is an abundant number, since it is smaller than the sum of its proper divisors (25348499418).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21711430746 is a wasteful number, since it uses less digits than its factorization.

21711430746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474286 (or 474283 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The spelling of 21711430746 in words is "twenty-one billion, seven hundred eleven million, four hundred thirty thousand, seven hundred forty-six".