21014270 has 32 divisors (see below), whose sum is σ = 39424320. Its totient is φ = 8055040.

The previous prime is 21014243. The next prime is 21014297. The reversal of 21014270 is 7241012.

It is an interprime number because it is at equal distance from previous prime (21014243) and next prime (21014297).

It is a congruent number.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 67415 + ... + 67725.

It is an arithmetic number, because the mean of its divisors is an integer number (1232010).

Almost surely, 2^21014270 is an apocalyptic number.

21014270 is a deficient number, since it is larger than the sum of its proper divisors (18410050).

21014270 is a wasteful number, since it uses less digits than its factorization.

21014270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 580.

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 21014270 is about 4584.1324151905. The cubic root of 21014270 is about 275.9548953108.

Adding to 21014270 its reverse (7241012), we get a palindrome (28255282).

The spelling of 21014270 in words is "twenty-one million, fourteen thousand, two hundred seventy".