20340142 has 8 divisors (see below), whose sum is σ = 31836816. Its totient is φ = 9727872.

The previous prime is 20340101. The next prime is 20340167. The reversal of 20340142 is 24104302.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 221043 + ... + 221134.

It is an arithmetic number, because the mean of its divisors is an integer number (3979602).

Almost surely, 2^20340142 is an apocalyptic number.

20340142 is a deficient number, since it is larger than the sum of its proper divisors (11496674).

20340142 is a wasteful number, since it uses less digits than its factorization.

20340142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442202.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 20340142 is about 4510.0046563169. The cubic root of 20340142 is about 272.9719319764.

Adding to 20340142 its reverse (24104302), we get a palindrome (44444444).

The spelling of 20340142 in words is "twenty million, three hundred forty thousand, one hundred forty-two".