21036532 has 24 divisors (see below), whose sum is σ = 40525632. Its totient is φ = 9475200.

The previous prime is 21036527. The next prime is 21036539. The reversal of 21036532 is 23563012.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21036539) 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, 2857 + ... + 7087.

It is an arithmetic number, because the mean of its divisors is an integer number (1688568).

Almost surely, 2^21036532 is an apocalyptic number.

21036532 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21036532 is a deficient number, since it is larger than the sum of its proper divisors (19489100).

21036532 is a wasteful number, since it uses less digits than its factorization.

21036532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4359 (or 4357 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 21036532 is about 4586.5599309286. The cubic root of 21036532 is about 276.0523075264.

Adding to 21036532 its reverse (23563012), we get a palindrome (44599544).

The spelling of 21036532 in words is "twenty-one million, thirty-six thousand, five hundred thirty-two".