21030954 has 32 divisors (see below), whose sum is σ = 48263040. Its totient is φ = 5984832.

The previous prime is 21030953. The next prime is 21030973. The reversal of 21030954 is 45903012.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21030953) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11452 + ... + 13160.

It is an arithmetic number, because the mean of its divisors is an integer number (1508220).

Almost surely, 2^21030954 is an apocalyptic number.

21030954 is an abundant number, since it is smaller than the sum of its proper divisors (27232086).

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

21030954 is a wasteful number, since it uses less digits than its factorization.

21030954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2014.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 21030954 is about 4585.9518096029. The cubic root of 21030954 is about 276.0279062310.

Adding to 21030954 its reverse (45903012), we get a palindrome (66933966).

The spelling of 21030954 in words is "twenty-one million, thirty thousand, nine hundred fifty-four".