21935005 has 8 divisors (see below), whose sum is σ = 26353152. Its totient is φ = 17527248.

The previous prime is 21935003. The next prime is 21935009. The reversal of 21935005 is 50053912.

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

It is a cyclic number.

It is not a de Polignac number, because 21935005 - 2¹ = 21935003 is a prime.

It is a super-2 number, since 2×21935005² = 962288888700050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21935003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3252 + ... + 7378.

It is an arithmetic number, because the mean of its divisors is an integer number (3294144).

Almost surely, 2^21935005 is an apocalyptic number.

It is an amenable number.

21935005 is a deficient number, since it is larger than the sum of its proper divisors (4418147).

21935005 is a wasteful number, since it uses less digits than its factorization.

21935005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5195.

The product of its (nonzero) digits is 1350, while the sum is 25.

The square root of 21935005 is about 4683.4821447295. The cubic root of 21935005 is about 279.9277236919.

Adding to 21935005 its reverse (50053912), we get a palindrome (71988917).

The spelling of 21935005 in words is "twenty-one million, nine hundred thirty-five thousand, five".