20291234 has 16 divisors (see below), whose sum is σ = 32400000. Its totient is φ = 9497664.

The previous prime is 20291233. The next prime is 20291273. The reversal of 20291234 is 43219202.

It is not an unprimeable number, because it can be changed into a prime (20291231) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 5267 + ... + 8265.

It is an arithmetic number, because the mean of its divisors is an integer number (2025000).

Almost surely, 2^20291234 is an apocalyptic number.

20291234 is a deficient number, since it is larger than the sum of its proper divisors (12108766).

20291234 is a wasteful number, since it uses less digits than its factorization.

20291234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3217.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 20291234 is about 4504.5792256325. The cubic root of 20291234 is about 272.7529688045.

The spelling of 20291234 in words is "twenty million, two hundred ninety-one thousand, two hundred thirty-four".