20342147 has 8 divisors (see below), whose sum is σ = 23454816. Its totient is φ = 17281152.

The previous prime is 20342131. The next prime is 20342167. The reversal of 20342147 is 74124302.

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

It is not a de Polignac number, because 20342147 - 2⁴ = 20342131 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20342167) 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, 12068 + ... + 13649.

It is an arithmetic number, because the mean of its divisors is an integer number (2931852).

Almost surely, 2^20342147 is an apocalyptic number.

20342147 is a deficient number, since it is larger than the sum of its proper divisors (3112669).

20342147 is a wasteful number, since it uses less digits than its factorization.

20342147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25837.

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 20342147 is about 4510.2269344236. The cubic root of 20342147 is about 272.9809009525.

Adding to 20342147 its reverse (74124302), we get a palindrome (94466449).

The spelling of 20342147 in words is "twenty million, three hundred forty-two thousand, one hundred forty-seven".