20093047 has 4 divisors (see below), whose sum is σ = 21638680. Its totient is φ = 18547416.

The previous prime is 20093039. The next prime is 20093069. The reversal of 20093047 is 74039002.

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 20093047 - 2³ = 20093039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20093077) 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 3 ways as a sum of consecutive naturals, for example, 772797 + ... + 772822.

It is an arithmetic number, because the mean of its divisors is an integer number (5409670).

Almost surely, 2^20093047 is an apocalyptic number.

20093047 is a deficient number, since it is larger than the sum of its proper divisors (1545633).

20093047 is a wasteful number, since it uses less digits than its factorization.

20093047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1545632.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 20093047 is about 4482.5268543535. The cubic root of 20093047 is about 271.8620579033.

The spelling of 20093047 in words is "twenty million, ninety-three thousand, forty-seven".