21054282 has 16 divisors (see below), whose sum is σ = 42343392. Its totient is φ = 6978960.

The previous prime is 21054277. The next prime is 21054287. The reversal of 21054282 is 28245012.

It is an interprime number because it is at equal distance from previous prime (21054277) and next prime (21054287).

It is not an unprimeable number, because it can be changed into a prime (21054287) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8608 + ... + 10779.

It is an arithmetic number, because the mean of its divisors is an integer number (2646462).

Almost surely, 2^21054282 is an apocalyptic number.

21054282 is an abundant number, since it is smaller than the sum of its proper divisors (21289110).

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

21054282 is a wasteful number, since it uses less digits than its factorization.

21054282 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19573.

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 21054282 is about 4588.4945243511. The cubic root of 21054282 is about 276.1299272748.

Adding to 21054282 its reverse (28245012), we get a palindrome (49299294).

The spelling of 21054282 in words is "twenty-one million, fifty-four thousand, two hundred eighty-two".