21710567312 has 80 divisors (see below), whose sum is σ = 49734566784. Its totient is φ = 8987520000.

The previous prime is 21710567309. The next prime is 21710567327. The reversal of 21710567312 is 21376501712.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 440387 + ... + 487197.

Almost surely, 2^21710567312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21710567312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24867283392).

21710567312 is an abundant number, since it is smaller than the sum of its proper divisors (28023999472).

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

21710567312 is a wasteful number, since it uses less digits than its factorization.

21710567312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46968 (or 46962 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 35.

The spelling of 21710567312 in words is "twenty-one billion, seven hundred ten million, five hundred sixty-seven thousand, three hundred twelve".