20340147 has 4 divisors (see below), whose sum is σ = 27120200. Its totient is φ = 13560096.

The previous prime is 20340101. The next prime is 20340167. The reversal of 20340147 is 74104302.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20340147 - 2¹¹ = 20338099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20340167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3390022 + ... + 3390027.

It is an arithmetic number, because the mean of its divisors is an integer number (6780050).

Almost surely, 2^20340147 is an apocalyptic number.

20340147 is a deficient number, since it is larger than the sum of its proper divisors (6780053).

20340147 is an equidigital number, since it uses as much as digits as its factorization.

20340147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6780052.

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 20340147 is about 4510.0052106400. The cubic root of 20340147 is about 272.9719543436.

Adding to 20340147 its reverse (74104302), we get a palindrome (94444449).

The spelling of 20340147 in words is "twenty million, three hundred forty thousand, one hundred forty-seven".