20353047 has 48 divisors (see below), whose sum is σ = 33962880. Its totient is φ = 10739520.

The previous prime is 20353043. The next prime is 20353049. The reversal of 20353047 is 74035302.

20353047 = 304² + 305² + ... + 446².

It is not a de Polignac number, because 20353047 - 2² = 20353043 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20353043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 89548 + ... + 89774.

It is an arithmetic number, because the mean of its divisors is an integer number (707560).

Almost surely, 2^20353047 is an apocalyptic number.

20353047 is a deficient number, since it is larger than the sum of its proper divisors (13609833).

20353047 is a wasteful number, since it uses less digits than its factorization.

20353047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284 (or 273 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 24.

The square root of 20353047 is about 4511.4351375144. The cubic root of 20353047 is about 273.0296496665.

Adding to 20353047 its reverse (74035302), we get a palindrome (94388349).

The spelling of 20353047 in words is "twenty million, three hundred fifty-three thousand, forty-seven".