21052654 has 16 divisors (see below), whose sum is σ = 36828000. Its totient is φ = 9022272.

The previous prime is 21052651. The next prime is 21052679. The reversal of 21052654 is 45625012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21052651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14659 + ... + 16030.

It is an arithmetic number, because the mean of its divisors is an integer number (2301750).

Almost surely, 2^21052654 is an apocalyptic number.

21052654 is a deficient number, since it is larger than the sum of its proper divisors (15775346).

21052654 is an equidigital number, since it uses as much as digits as its factorization.

21052654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30712 (or 30698 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 21052654 is about 4588.3171206882. The cubic root of 21052654 is about 276.1228099402.

Adding to 21052654 its reverse (45625012), we get a palindrome (66677666).

The spelling of 21052654 in words is "twenty-one million, fifty-two thousand, six hundred fifty-four".