21485276 has 18 divisors (see below), whose sum is σ = 39684960. Its totient is φ = 10176552.

The previous prime is 21485273. The next prime is 21485291. The reversal of 21485276 is 67258412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21485273) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5996 + ... + 8883.

It is an arithmetic number, because the mean of its divisors is an integer number (2204720).

Almost surely, 2^21485276 is an apocalyptic number.

It is an amenable number.

21485276 is a deficient number, since it is larger than the sum of its proper divisors (18199684).

21485276 is a wasteful number, since it uses less digits than its factorization.

21485276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14921 (or 14900 counting only the distinct ones).

The product of its digits is 26880, while the sum is 35.

The square root of 21485276 is about 4635.2212460680. The cubic root of 21485276 is about 278.0013974362.

The spelling of 21485276 in words is "twenty-one million, four hundred eighty-five thousand, two hundred seventy-six".