21064848 has 80 divisors (see below), whose sum is σ = 63138816. Its totient is φ = 5927040.

The previous prime is 21064843. The next prime is 21064891. The reversal of 21064848 is 84846012.

It is not an unprimeable number, because it can be changed into a prime (21064843) 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, 23415 + ... + 24297.

Almost surely, 2^21064848 is an apocalyptic number.

21064848 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 21064848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31569408).

21064848 is an abundant number, since it is smaller than the sum of its proper divisors (42073968).

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

21064848 is a wasteful number, since it uses less digits than its factorization.

21064848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 972 (or 966 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 33.

The square root of 21064848 is about 4589.6457379628. The cubic root of 21064848 is about 276.1761110850.

It can be divided in two parts, 21064 and 848, that added together give a palindrome (21912).

The spelling of 21064848 in words is "twenty-one million, sixty-four thousand, eight hundred forty-eight".