20239534 has 16 divisors (see below), whose sum is σ = 35352288. Its totient is φ = 8510112.

The previous prime is 20239529. The next prime is 20239553. The reversal of 20239534 is 43593202.

It is a super-3 number, since 3×20239534³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 12897 + ... + 14380.

It is an arithmetic number, because the mean of its divisors is an integer number (2209518).

Almost surely, 2^20239534 is an apocalyptic number.

20239534 is a deficient number, since it is larger than the sum of its proper divisors (15112754).

20239534 is a wasteful number, since it uses less digits than its factorization.

20239534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27339.

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 20239534 is about 4498.8369608155. The cubic root of 20239534 is about 272.5211228471.

The spelling of 20239534 in words is "twenty million, two hundred thirty-nine thousand, five hundred thirty-four".