21702968 has 32 divisors (see below), whose sum is σ = 46656000. Its totient is φ = 9271392.

The previous prime is 21702953. The next prime is 21702977. The reversal of 21702968 is 86920712.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33221 + ... + 33867.

It is an arithmetic number, because the mean of its divisors is an integer number (1458000).

Almost surely, 2^21702968 is an apocalyptic number.

21702968 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

21702968 is an abundant number, since it is smaller than the sum of its proper divisors (24953032).

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

21702968 is a wasteful number, since it uses less digits than its factorization.

21702968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1259 (or 1255 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 21702968 is about 4658.6444380313. The cubic root of 21702968 is about 278.9371612011.

The spelling of 21702968 in words is "twenty-one million, seven hundred two thousand, nine hundred sixty-eight".