21485295 has 48 divisors (see below), whose sum is σ = 42238560. Its totient is φ = 10015488.

The previous prime is 21485291. The next prime is 21485327. The reversal of 21485295 is 59258412.

It is not a de Polignac number, because 21485295 - 2² = 21485291 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21485291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10149 + ... + 12081.

It is an arithmetic number, because the mean of its divisors is an integer number (879970).

Almost surely, 2^21485295 is an apocalyptic number.

21485295 is a deficient number, since it is larger than the sum of its proper divisors (20753265).

21485295 is a wasteful number, since it uses less digits than its factorization.

21485295 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1976 (or 1973 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The square root of 21485295 is about 4635.2232955921. The cubic root of 21485295 is about 278.0014793842.

The spelling of 21485295 in words is "twenty-one million, four hundred eighty-five thousand, two hundred ninety-five".