20032047 has 12 divisors (see below), whose sum is σ = 33068880. Its totient is φ = 11446848.

The previous prime is 20032043. The next prime is 20032079. The reversal of 20032047 is 74023002.

It is a happy number.

It is not a de Polignac number, because 20032047 - 2² = 20032043 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20032043) 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 11 ways as a sum of consecutive naturals, for example, 158922 + ... + 159047.

It is an arithmetic number, because the mean of its divisors is an integer number (2755740).

Almost surely, 2^20032047 is an apocalyptic number.

20032047 is a deficient number, since it is larger than the sum of its proper divisors (13036833).

20032047 is a wasteful number, since it uses less digits than its factorization.

20032047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317982 (or 317979 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 18.

The square root of 20032047 is about 4475.7174843817. The cubic root of 20032047 is about 271.5866658602.

Adding to 20032047 its reverse (74023002), we get a palindrome (94055049).

The spelling of 20032047 in words is "twenty million, thirty-two thousand, forty-seven".