20342353 has 4 divisors (see below), whose sum is σ = 21538980. Its totient is φ = 19145728.

The previous prime is 20342351. The next prime is 20342359. The reversal of 20342353 is 35324302.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5419584 + 14922769 = 2328^2 + 3863^2 .

It is a cyclic number.

It is not a de Polignac number, because 20342353 - 2¹ = 20342351 is a prime.

It is a super-2 number, since 2×20342353² = 827622651153218, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20342351) 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, 598288 + ... + 598321.

It is an arithmetic number, because the mean of its divisors is an integer number (5384745).

Almost surely, 2^20342353 is an apocalyptic number.

It is an amenable number.

20342353 is a deficient number, since it is larger than the sum of its proper divisors (1196627).

20342353 is a wasteful number, since it uses less digits than its factorization.

20342353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1196626.

The product of its (nonzero) digits is 2160, while the sum is 22.

The square root of 20342353 is about 4510.2497713541. The cubic root of 20342353 is about 272.9818224199.

Adding to 20342353 its reverse (35324302), we get a palindrome (55666655).

The spelling of 20342353 in words is "twenty million, three hundred forty-two thousand, three hundred fifty-three".