20342051 has 4 divisors (see below), whose sum is σ = 21226512. Its totient is φ = 19457592.

The previous prime is 20342041. The next prime is 20342059. The reversal of 20342051 is 15024302.

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

It is a cyclic number.

It is not a de Polignac number, because 20342051 - 2⁶ = 20341987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20342059) 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, 442196 + ... + 442241.

It is an arithmetic number, because the mean of its divisors is an integer number (5306628).

Almost surely, 2^20342051 is an apocalyptic number.

20342051 is a deficient number, since it is larger than the sum of its proper divisors (884461).

20342051 is an equidigital number, since it uses as much as digits as its factorization.

20342051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 884460.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 20342051 is about 4510.2162919310. The cubic root of 20342051 is about 272.9804715286.

Adding to 20342051 its reverse (15024302), we get a palindrome (35366353).

The spelling of 20342051 in words is "twenty million, three hundred forty-two thousand, fifty-one".