21150676 has 6 divisors (see below), whose sum is σ = 37013690. Its totient is φ = 10575336.

The previous prime is 21150673. The next prime is 21150683. The reversal of 21150676 is 67605112.

It can be written as a sum of positive squares in only one way, i.e., 16613776 + 4536900 = 4076^2 + 2130^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21150671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2643831 + ... + 2643838.

Almost surely, 2^21150676 is an apocalyptic number.

It is an amenable number.

21150676 is a deficient number, since it is larger than the sum of its proper divisors (15863014).

21150676 is a wasteful number, since it uses less digits than its factorization.

21150676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5287673 (or 5287671 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 21150676 is about 4598.9864100691. The cubic root of 21150676 is about 276.5506928322.

Adding to 21150676 its reverse (67605112), we get a palindrome (88755788).

The spelling of 21150676 in words is "twenty-one million, one hundred fifty thousand, six hundred seventy-six".