21246632 has 48 divisors (see below), whose sum is σ = 44815680. Its totient is φ = 9431840.

The previous prime is 21246629. The next prime is 21246637. The reversal of 21246632 is 23664212.

It is not an unprimeable number, because it can be changed into a prime (21246637) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45263 + ... + 45729.

It is an arithmetic number, because the mean of its divisors is an integer number (933660).

Almost surely, 2^21246632 is an apocalyptic number.

21246632 is a gapful number since it is divisible by the number (22) 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 21246632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22407840).

21246632 is an abundant number, since it is smaller than the sum of its proper divisors (23569048).

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

21246632 is a wasteful number, since it uses less digits than its factorization.

21246632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542 (or 527 counting only the distinct ones).

The product of its digits is 3456, while the sum is 26.

The square root of 21246632 is about 4609.4069032794. The cubic root of 21246632 is about 276.9682786771.

The spelling of 21246632 in words is "twenty-one million, two hundred forty-six thousand, six hundred thirty-two".