21014707 has 4 divisors (see below), whose sum is σ = 24016816. Its totient is φ = 18012600.

The previous prime is 21014701. The next prime is 21014713. The reversal of 21014707 is 70741012.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (21014701) and next prime (21014713).

It is a cyclic number.

It is not a de Polignac number, because 21014707 - 2⁷ = 21014579 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21014701) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1501044 + ... + 1501057.

It is an arithmetic number, because the mean of its divisors is an integer number (6004204).

Almost surely, 2^21014707 is an apocalyptic number.

21014707 is a deficient number, since it is larger than the sum of its proper divisors (3002109).

21014707 is an equidigital number, since it uses as much as digits as its factorization.

21014707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3002108.

The product of its (nonzero) digits is 392, while the sum is 22.

The square root of 21014707 is about 4584.1800793599. The cubic root of 21014707 is about 275.9568081610.

Adding to 21014707 its reverse (70741012), we get a palindrome (91755719).

The spelling of 21014707 in words is "twenty-one million, fourteen thousand, seven hundred seven".