20353147 has 8 divisors (see below), whose sum is σ = 20996096. Its totient is φ = 19717992.

The previous prime is 20353121. The next prime is 20353153. The reversal of 20353147 is 74135302.

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 20353147 - 2¹⁹ = 19828859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20353117) 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, 3598 + ... + 7324.

It is an arithmetic number, because the mean of its divisors is an integer number (2624512).

Almost surely, 2^20353147 is an apocalyptic number.

20353147 is a deficient number, since it is larger than the sum of its proper divisors (642949).

20353147 is a wasteful number, since it uses less digits than its factorization.

20353147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3897.

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 20353147 is about 4511.4462204486. The cubic root of 20353147 is about 273.0300968219.

Adding to 20353147 its reverse (74135302), we get a palindrome (94488449).

The spelling of 20353147 in words is "twenty million, three hundred fifty-three thousand, one hundred forty-seven".