21241036 has 12 divisors (see below), whose sum is σ = 37255680. Its totient is φ = 10596560.

The previous prime is 21241013. The next prime is 21241037. The reversal of 21241036 is 63014212.

It is a super-2 number, since 2×21241036² = 902363220706592, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21241037) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3916 + ... + 7603.

It is an arithmetic number, because the mean of its divisors is an integer number (3104640).

Almost surely, 2^21241036 is an apocalyptic number.

It is an amenable number.

21241036 is a deficient number, since it is larger than the sum of its proper divisors (16014644).

21241036 is a wasteful number, since it uses less digits than its factorization.

21241036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11984 (or 11982 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 21241036 is about 4608.7998437771. The cubic root of 21241036 is about 276.9439603039.

Adding to 21241036 its reverse (63014212), we get a palindrome (84255248).

It can be divided in two parts, 2124 and 1036, that added together give a triangular number (3160 = T₇₉).

The spelling of 21241036 in words is "twenty-one million, two hundred forty-one thousand, thirty-six".