20342247 has 8 divisors (see below), whose sum is σ = 27145344. Its totient is φ = 13550328.

The previous prime is 20342243. The next prime is 20342249. The reversal of 20342247 is 74224302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20342247 - 2² = 20342243 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20342243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3448 + ... + 7250.

It is an arithmetic number, because the mean of its divisors is an integer number (3393168).

Almost surely, 2^20342247 is an apocalyptic number.

20342247 is a deficient number, since it is larger than the sum of its proper divisors (6803097).

20342247 is a wasteful number, since it uses less digits than its factorization.

20342247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5589.

The product of its (nonzero) digits is 2688, while the sum is 24.

The square root of 20342247 is about 4510.2380203266. The cubic root of 20342247 is about 272.9813482675.

Adding to 20342247 its reverse (74224302), we get a palindrome (94566549).

The spelling of 20342247 in words is "twenty million, three hundred forty-two thousand, two hundred forty-seven".