21790702 has 16 divisors (see below), whose sum is σ = 34715520. Its totient is φ = 10222848.

The previous prime is 21790697. The next prime is 21790711. The reversal of 21790702 is 20709712.

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 (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13123 + ... + 14689.

It is an arithmetic number, because the mean of its divisors is an integer number (2169720).

Almost surely, 2^21790702 is an apocalyptic number.

21790702 is a deficient number, since it is larger than the sum of its proper divisors (12924818).

21790702 is a wasteful number, since it uses less digits than its factorization.

21790702 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1995.

The product of its (nonzero) digits is 1764, while the sum is 28.

The square root of 21790702 is about 4668.0511993765. The cubic root of 21790702 is about 279.3125226182.

The spelling of 21790702 in words is "twenty-one million, seven hundred ninety thousand, seven hundred two".