21024854 has 8 divisors (see below), whose sum is σ = 31651968. Its totient is φ = 10474200.

The previous prime is 21024853. The next prime is 21024859. The reversal of 21024854 is 45842012.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21024853) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18422 + ... + 19529.

It is an arithmetic number, because the mean of its divisors is an integer number (3956496).

Almost surely, 2^21024854 is an apocalyptic number.

21024854 is a deficient number, since it is larger than the sum of its proper divisors (10627114).

21024854 is a wasteful number, since it uses less digits than its factorization.

21024854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38230.

The product of its (nonzero) digits is 2560, while the sum is 26.

The square root of 21024854 is about 4585.2866867842. The cubic root of 21024854 is about 276.0012164758.

Adding to 21024854 its reverse (45842012), we get a palindrome (66866866).

The spelling of 21024854 in words is "twenty-one million, twenty-four thousand, eight hundred fifty-four".