21700968 has 16 divisors (see below), whose sum is σ = 54252480. Its totient is φ = 7233648.

The previous prime is 21700963. The next prime is 21700969. The reversal of 21700968 is 86900712.

It is not an unprimeable number, because it can be changed into a prime (21700963) 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, 452080 + ... + 452127.

It is an arithmetic number, because the mean of its divisors is an integer number (3390780).

Almost surely, 2^21700968 is an apocalyptic number.

It is an amenable number.

21700968 is an abundant number, since it is smaller than the sum of its proper divisors (32551512).

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

21700968 is a wasteful number, since it uses less digits than its factorization.

21700968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 904216 (or 904212 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 21700968 is about 4658.4297783695. The cubic root of 21700968 is about 278.9285926118.

The spelling of 21700968 in words is "twenty-one million, seven hundred thousand, nine hundred sixty-eight".