21700712 has 16 divisors (see below), whose sum is σ = 44388000. Its totient is φ = 9863920.

The previous prime is 21700711. The next prime is 21700741.

21700712 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (21700711) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123212 + ... + 123387.

It is an arithmetic number, because the mean of its divisors is an integer number (2774250).

Almost surely, 2^21700712 is an apocalyptic number.

21700712 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21700712 is an abundant number, since it is smaller than the sum of its proper divisors (22687288).

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

21700712 is a wasteful number, since it uses less digits than its factorization.

21700712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246616 (or 246612 counting only the distinct ones).

The product of its (nonzero) digits is 196, while the sum is 20.

The square root of 21700712 is about 4658.4023012187. The cubic root of 21700712 is about 278.9274957944.

The spelling of 21700712 in words is "twenty-one million, seven hundred thousand, seven hundred twelve".