20344429 has 4 divisors (see below), whose sum is σ = 23250784. Its totient is φ = 17438076.

The previous prime is 20344417. The next prime is 20344433. The reversal of 20344429 is 92444302.

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 20344429 - 2¹³ = 20336237 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20344397 and 20344406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20344469) 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, 1453167 + ... + 1453180.

It is an arithmetic number, because the mean of its divisors is an integer number (5812696).

Almost surely, 2^20344429 is an apocalyptic number.

It is an amenable number.

20344429 is a deficient number, since it is larger than the sum of its proper divisors (2906355).

20344429 is an equidigital number, since it uses as much as digits as its factorization.

20344429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2906354.

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 20344429 is about 4510.4799079477. The cubic root of 20344429 is about 272.9911083169.

The spelling of 20344429 in words is "twenty million, three hundred forty-four thousand, four hundred twenty-nine".