21930695 has 8 divisors (see below), whose sum is σ = 26958960. Its totient is φ = 17116480.

The previous prime is 21930683. The next prime is 21930709. The reversal of 21930695 is 59603912.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21930695 - 2⁴ = 21930679 is a prime.

It is a congruent number.

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, 53285 + ... + 53694.

It is an arithmetic number, because the mean of its divisors is an integer number (3369870).

Almost surely, 2^21930695 is an apocalyptic number.

21930695 is a deficient number, since it is larger than the sum of its proper divisors (5028265).

21930695 is a wasteful number, since it uses less digits than its factorization.

21930695 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107025.

The product of its (nonzero) digits is 14580, while the sum is 35.

The square root of 21930695 is about 4683.0219943964. The cubic root of 21930695 is about 279.9093881970.

The spelling of 21930695 in words is "twenty-one million, nine hundred thirty thousand, six hundred ninety-five".