21163036 has 24 divisors (see below), whose sum is σ = 40682880. Its totient is φ = 9587952.

The previous prime is 21163033. The next prime is 21163057. The reversal of 21163036 is 63036112.

21163036 is a modest number, since divided by 3036 gives 2116 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 21162998 and 21163016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21163033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4306 + ... + 7801.

It is an arithmetic number, because the mean of its divisors is an integer number (1695120).

Almost surely, 2^21163036 is an apocalyptic number.

It is an amenable number.

21163036 is a deficient number, since it is larger than the sum of its proper divisors (19519844).

21163036 is a wasteful number, since it uses less digits than its factorization.

21163036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12153 (or 12151 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 21163036 is about 4600.3299881639. The cubic root of 21163036 is about 276.6045524338.

Adding to 21163036 its reverse (63036112), we get a palindrome (84199148).

The spelling of 21163036 in words is "twenty-one million, one hundred sixty-three thousand, thirty-six".