21995675 has 12 divisors (see below), whose sum is σ = 29373120. Its totient is φ = 16242720.

The previous prime is 21995621. The next prime is 21995681. The reversal of 21995675 is 57659912.

21995675 = T₁₃₁₄ + T₁₃₁₅ + ... + T₁₃₃₈.

It is a happy number.

It is not a de Polignac number, because 21995675 - 2⁸ = 21995419 is a prime.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

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 11 ways as a sum of consecutive naturals, for example, 33515 + ... + 34164.

It is an arithmetic number, because the mean of its divisors is an integer number (2447760).

Almost surely, 2^21995675 is an apocalyptic number.

21995675 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21995675 is a deficient number, since it is larger than the sum of its proper divisors (7377445).

21995675 is a wasteful number, since it uses less digits than its factorization.

21995675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67702 (or 67697 counting only the distinct ones).

The product of its digits is 170100, while the sum is 44.

The square root of 21995675 is about 4689.9546906127. The cubic root of 21995675 is about 280.1855700135.

The spelling of 21995675 in words is "twenty-one million, nine hundred ninety-five thousand, six hundred seventy-five".