21053795 has 16 divisors (see below), whose sum is σ = 28950528. Its totient is φ = 14398560.

The previous prime is 21053783. The next prime is 21053831. The reversal of 21053795 is 59735012.

It is not a de Polignac number, because 21053795 - 2⁶ = 21053731 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20750 + ... + 21740.

It is an arithmetic number, because the mean of its divisors is an integer number (1809408).

Almost surely, 2^21053795 is an apocalyptic number.

21053795 is a deficient number, since it is larger than the sum of its proper divisors (7896733).

21053795 is an equidigital number, since it uses as much as digits as its factorization.

21053795 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1610.

The product of its (nonzero) digits is 9450, while the sum is 32.

The square root of 21053795 is about 4588.4414565297. The cubic root of 21053795 is about 276.1277982335.

The spelling of 21053795 in words is "twenty-one million, fifty-three thousand, seven hundred ninety-five".