20429075 has 6 divisors (see below), whose sum is σ = 25332084. Its totient is φ = 16343240.

The previous prime is 20429063. The next prime is 20429077. The reversal of 20429075 is 57092402.

It is not a de Polignac number, because 20429075 - 2⁶ = 20429011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20429077) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 408557 + ... + 408606.

It is an arithmetic number, because the mean of its divisors is an integer number (4222014).

Almost surely, 2^20429075 is an apocalyptic number.

20429075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20429075 is a deficient number, since it is larger than the sum of its proper divisors (4903009).

20429075 is an equidigital number, since it uses as much as digits as its factorization.

20429075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 817173 (or 817168 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 20429075 is about 4519.8534268270. The cubic root of 20429075 is about 273.3691910456.

The spelling of 20429075 in words is "twenty million, four hundred twenty-nine thousand, seventy-five".