20429398 has 48 divisors (see below), whose sum is σ = 36197280. Its totient is φ = 8624000.

The previous prime is 20429377. The next prime is 20429401. The reversal of 20429398 is 89392402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 287703 + ... + 287773.

It is an arithmetic number, because the mean of its divisors is an integer number (754110).

Almost surely, 2^20429398 is an apocalyptic number.

20429398 is a deficient number, since it is larger than the sum of its proper divisors (15767882).

20429398 is a wasteful number, since it uses less digits than its factorization.

20429398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165 (or 154 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 20429398 is about 4519.8891579330. The cubic root of 20429398 is about 273.3706317665.

The spelling of 20429398 in words is "twenty million, four hundred twenty-nine thousand, three hundred ninety-eight".