20429346 has 32 divisors (see below), whose sum is σ = 46850688. Its totient is φ = 5817600.

The previous prime is 20429333. The next prime is 20429363. The reversal of 20429346 is 64392402.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16236 + ... + 17448.

It is an arithmetic number, because the mean of its divisors is an integer number (1464084).

Almost surely, 2^20429346 is an apocalyptic number.

20429346 is an abundant number, since it is smaller than the sum of its proper divisors (26421342).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20429346 is a wasteful number, since it uses less digits than its factorization.

20429346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1626.

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 20429346 is about 4519.8834055759. The cubic root of 20429346 is about 273.3703998248.

The spelling of 20429346 in words is "twenty million, four hundred twenty-nine thousand, three hundred forty-six".