20271947 has 8 divisors (see below), whose sum is σ = 21501600. Its totient is φ = 19071360.

The previous prime is 20271919. The next prime is 20271949. The reversal of 20271947 is 74917202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20271947 - 2⁶ = 20271883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20271949) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 5822 + ... + 8627.

It is an arithmetic number, because the mean of its divisors is an integer number (2687700).

Almost surely, 2^20271947 is an apocalyptic number.

20271947 is a deficient number, since it is larger than the sum of its proper divisors (1229653).

20271947 is a wasteful number, since it uses less digits than its factorization.

20271947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14533.

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 20271947 is about 4502.4378951852. The cubic root of 20271947 is about 272.6665233615. Note that the first 3 decimals are identical.

The spelling of 20271947 in words is "twenty million, two hundred seventy-one thousand, nine hundred forty-seven".