21014955 has 24 divisors (see below), whose sum is σ = 39229008. Its totient is φ = 10345536.

The previous prime is 21014951. The next prime is 21014957. The reversal of 21014955 is 55941012.

It is not a de Polignac number, because 21014955 - 2² = 21014951 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21014951) 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 23 ways as a sum of consecutive naturals, for example, 17377 + ... + 18546.

It is an arithmetic number, because the mean of its divisors is an integer number (1634542).

Almost surely, 2^21014955 is an apocalyptic number.

21014955 is a deficient number, since it is larger than the sum of its proper divisors (18214053).

21014955 is a wasteful number, since it uses less digits than its factorization.

21014955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35947 (or 35944 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The square root of 21014955 is about 4584.2071288283. The cubic root of 21014955 is about 275.9578937027.

Adding to 21014955 its reverse (55941012), we get a palindrome (76955967).

It can be divided in two parts, 2101 and 4955, that added together give a square (7056 = 84²).

The spelling of 21014955 in words is "twenty-one million, fourteen thousand, nine hundred fifty-five".