21795741 has 24 divisors (see below), whose sum is σ = 34617024. Its totient is φ = 13104960.

The previous prime is 21795737. The next prime is 21795757. The reversal of 21795741 is 14759712.

It is a happy number.

It is not a de Polignac number, because 21795741 - 2² = 21795737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21795696 and 21795705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21795341) 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 23 ways as a sum of consecutive naturals, for example, 12760 + ... + 14366.

It is an arithmetic number, because the mean of its divisors is an integer number (1442376).

Almost surely, 2^21795741 is an apocalyptic number.

It is an amenable number.

21795741 is a deficient number, since it is larger than the sum of its proper divisors (12821283).

21795741 is a wasteful number, since it uses less digits than its factorization.

21795741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1761 (or 1758 counting only the distinct ones).

The product of its digits is 17640, while the sum is 36.

The square root of 21795741 is about 4668.5909009036. The cubic root of 21795741 is about 279.3340508725.

The spelling of 21795741 in words is "twenty-one million, seven hundred ninety-five thousand, seven hundred forty-one".