20893047 has 8 divisors (see below), whose sum is σ = 31837056. Its totient is φ = 11938872.

The previous prime is 20893043. The next prime is 20893073. The reversal of 20893047 is 74039802.

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

It is not a de Polignac number, because 20893047 - 2² = 20893043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20892999 and 20893017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20893043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 497433 + ... + 497474.

It is an arithmetic number, because the mean of its divisors is an integer number (3979632).

Almost surely, 2^20893047 is an apocalyptic number.

20893047 is a deficient number, since it is larger than the sum of its proper divisors (10944009).

20893047 is an equidigital number, since it uses as much as digits as its factorization.

20893047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 994917.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 20893047 is about 4570.8912697635. The cubic root of 20893047 is about 275.4232468778.

The spelling of 20893047 in words is "twenty million, eight hundred ninety-three thousand, forty-seven".