20429042 has 8 divisors (see below), whose sum is σ = 31356336. Its totient is φ = 9976932.

The previous prime is 20429033. The next prime is 20429063. The reversal of 20429042 is 24092402.

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

It is a junction number, because it is equal to n+sod(n) for n = 20428999 and 20429017.

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, 118688 + ... + 118859.

It is an arithmetic number, because the mean of its divisors is an integer number (3919542).

Almost surely, 2^20429042 is an apocalyptic number.

20429042 is a deficient number, since it is larger than the sum of its proper divisors (10927294).

20429042 is a wasteful number, since it uses less digits than its factorization.

20429042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237592.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 20429042 is about 4519.8497762647. The cubic root of 20429042 is about 273.3690438504.

The spelling of 20429042 in words is "twenty million, four hundred twenty-nine thousand, forty-two".