21035232 has 36 divisors (see below), whose sum is σ = 59819760. Its totient is φ = 7011648.

The previous prime is 21035227. The next prime is 21035233. The reversal of 21035232 is 23253012.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21035233) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 36232 + ... + 36807.

It is an arithmetic number, because the mean of its divisors is an integer number (1661660).

Almost surely, 2^21035232 is an apocalyptic number.

It is an amenable number.

21035232 is an abundant number, since it is smaller than the sum of its proper divisors (38784528).

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

21035232 is a wasteful number, since it uses less digits than its factorization.

21035232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73055 (or 73044 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 21035232 is about 4586.4182103249. The cubic root of 21035232 is about 276.0466209840.

Adding to 21035232 its reverse (23253012), we get a palindrome (44288244).

The spelling of 21035232 in words is "twenty-one million, thirty-five thousand, two hundred thirty-two".