21024054 has 24 divisors (see below), whose sum is σ = 45641232. Its totient is φ = 6994320.

The previous prime is 21023971. The next prime is 21024067. The reversal of 21024054 is 45042012.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13159 + ... + 14669.

It is an arithmetic number, because the mean of its divisors is an integer number (1901718).

Almost surely, 2^21024054 is an apocalyptic number.

21024054 is an abundant number, since it is smaller than the sum of its proper divisors (24617178).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21024054 is a wasteful number, since it uses less digits than its factorization.

21024054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2292 (or 2289 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 21024054 is about 4585.1994504056. The cubic root of 21024054 is about 275.9977157971.

Adding to 21024054 its reverse (45042012), we get a palindrome (66066066).

The spelling of 21024054 in words is "twenty-one million, twenty-four thousand, fifty-four".