20947627 has 4 divisors (see below), whose sum is σ = 21242736. Its totient is φ = 20652520.

The previous prime is 20947613. The next prime is 20947631. The reversal of 20947627 is 72674902.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20947627 - 2⁷ = 20947499 is a prime.

It is a super-2 number, since 2×20947627² = 877606153862258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20947637) 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, 147448 + ... + 147589.

It is an arithmetic number, because the mean of its divisors is an integer number (5310684).

Almost surely, 2^20947627 is an apocalyptic number.

20947627 is a deficient number, since it is larger than the sum of its proper divisors (295109).

20947627 is an equidigital number, since it uses as much as digits as its factorization.

20947627 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295108.

The product of its (nonzero) digits is 42336, while the sum is 37.

The square root of 20947627 is about 4576.8577648863. The cubic root of 20947627 is about 275.6628725234.

The spelling of 20947627 in words is "twenty million, nine hundred forty-seven thousand, six hundred twenty-seven".