20342229 has 4 divisors (see below), whose sum is σ = 27122976. Its totient is φ = 13561484.

The previous prime is 20342213. The next prime is 20342243. The reversal of 20342229 is 92224302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20342229 - 2⁴ = 20342213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20342199 and 20342208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20342209) 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, 3390369 + ... + 3390374.

It is an arithmetic number, because the mean of its divisors is an integer number (6780744).

Almost surely, 2^20342229 is an apocalyptic number.

It is an amenable number.

20342229 is a deficient number, since it is larger than the sum of its proper divisors (6780747).

20342229 is an equidigital number, since it uses as much as digits as its factorization.

20342229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6780746.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 20342229 is about 4510.2360248661. The cubic root of 20342229 is about 272.9812677509.

The spelling of 20342229 in words is "twenty million, three hundred forty-two thousand, two hundred twenty-nine".