21492548 has 48 divisors (see below), whose sum is σ = 48427008. Its totient is φ = 8100000.

The previous prime is 21492547. The next prime is 21492551. The reversal of 21492548 is 84529412.

21492548 is a Rhonda number in base 10.

Its product of digits (23040) is a multiple of the sum of its prime factors (2304).

It is not an unprimeable number, because it can be changed into a prime (21492547) 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 15 ways as a sum of consecutive naturals, for example, 8423 + ... + 10673.

It is an arithmetic number, because the mean of its divisors is an integer number (1008896).

Almost surely, 2^21492548 is an apocalyptic number.

21492548 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21492548, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24213504).

21492548 is an abundant number, since it is smaller than the sum of its proper divisors (26934460).

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

21492548 is a wasteful number, since it uses less digits than its factorization.

21492548 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2304 (or 2302 counting only the distinct ones).

The product of its digits is 23040, while the sum is 35.

The square root of 21492548 is about 4636.0056082796. The cubic root of 21492548 is about 278.0327584191.

The spelling of 21492548 in words is "twenty-one million, four hundred ninety-two thousand, five hundred forty-eight".