21476708 has 24 divisors (see below), whose sum is σ = 41700960. Its totient is φ = 9595520.

The previous prime is 21476699. The next prime is 21476723. The reversal of 21476708 is 80767412.

It is a happy number.

It is a super-2 number, since 2×21476708² = 922497973034528, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1541 + ... + 6732.

It is an arithmetic number, because the mean of its divisors is an integer number (1737540).

Almost surely, 2^21476708 is an apocalyptic number.

It is an amenable number.

21476708 is a deficient number, since it is larger than the sum of its proper divisors (20224252).

21476708 is a wasteful number, since it uses less digits than its factorization.

21476708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8347 (or 8345 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 35.

The square root of 21476708 is about 4634.2969261798. The cubic root of 21476708 is about 277.9644382854.

The spelling of 21476708 in words is "twenty-one million, four hundred seventy-six thousand, seven hundred eight".