21054596 has 6 divisors (see below), whose sum is σ = 36845550. Its totient is φ = 10527296.

The previous prime is 21054569. The next prime is 21054601. The reversal of 21054596 is 69545012.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 15100996 + 5953600 = 3886^2 + 2440^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2631821 + ... + 2631828.

It is an arithmetic number, because the mean of its divisors is an integer number (6140925).

Almost surely, 2^21054596 is an apocalyptic number.

It is an amenable number.

21054596 is a deficient number, since it is larger than the sum of its proper divisors (15790954).

21054596 is a wasteful number, since it uses less digits than its factorization.

21054596 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5263653 (or 5263651 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 21054596 is about 4588.5287402391. The cubic root of 21054596 is about 276.1312999863.

The spelling of 21054596 in words is "twenty-one million, fifty-four thousand, five hundred ninety-six".