21014956 has 6 divisors (see below), whose sum is σ = 36776180. Its totient is φ = 10507476.

The previous prime is 21014951. The next prime is 21014957. The reversal of 21014956 is 65941012.

It is not an unprimeable number, because it can be changed into a prime (21014951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2626866 + ... + 2626873.

Almost surely, 2^21014956 is an apocalyptic number.

It is an amenable number.

21014956 is a deficient number, since it is larger than the sum of its proper divisors (15761224).

21014956 is a wasteful number, since it uses less digits than its factorization.

21014956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5253743 (or 5253741 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 21014956 is about 4584.2072378984. The cubic root of 21014956 is about 275.9578980798.

Adding to 21014956 its reverse (65941012), we get a palindrome (86955968).

The spelling of 21014956 in words is "twenty-one million, fourteen thousand, nine hundred fifty-six".