21930675 has 48 divisors (see below), whose sum is σ = 39664128. Its totient is φ = 10627200.

The previous prime is 21930673. The next prime is 21930679. The reversal of 21930675 is 57603912.

It is not a de Polignac number, because 21930675 - 2¹ = 21930673 is a prime.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (21930673) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 80790 + ... + 81060.

It is an arithmetic number, because the mean of its divisors is an integer number (826336).

Almost surely, 2^21930675 is an apocalyptic number.

21930675 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21930675 is a deficient number, since it is larger than the sum of its proper divisors (17733453).

21930675 is a wasteful number, since it uses less digits than its factorization.

21930675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380 (or 375 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 33.

The square root of 21930675 is about 4683.0198590226. The cubic root of 21930675 is about 279.9093031079.

The spelling of 21930675 in words is "twenty-one million, nine hundred thirty thousand, six hundred seventy-five".